1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8b37d9520c974b1b09ce3492651f2b27e2d0c790b54cd2228a7274adc99288. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/984cd4a9-7737-4034-921c-a80d08679507.json and https://artists.proofprofile.net/proofs/artist/984cd4a9-7737-4034-921c-a80d08679507.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ef23b846821bd97f1c604bdb5e15d1540f9c5cb723090bb5b1680aa88ffa22. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZA61A1301228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2015ca177d0e7448b2e7b1807016434b0c8169213c6caaddbedd876b3f3450. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZA61A1301217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f13965dcbcc26e1c39a79b86db877f72c27c6c6aafbd924b603f09cd450460. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZA61A1301224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f0209dcba8675b0e36570e28df39e43275fde6211268a9a051fbdfa17dce3b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZA61A1301218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4637901482a76008c6361ff79299fa30e55931222974b7628287f0d262cac1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZA61A1301232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082683cdafdf5bdf9779c746f5484c144858f9dc115be87804b753131969b276. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAQR41501017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4ac338d7863cb30a7beff0254c52f68fe2e0cadf4049123966dc2d3a261cac. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAQR41501019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6848db139afac77cc2289faf34402e01d81b99bc66ede6ba700756ad5f99af45. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAQR41501021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e349c7003f33aa1c996f11d0e1076eeda3aca26f73542c0e5f8f16d3a51112. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAQR41501024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee31a39f0f0b016507e7485839d620dd6139fc8cd8d7ca235e1e35db62c0026. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1672757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49e3ddeb056c04b0513f4b7224782d51fdc9f6ea2dd0f3a9211c3f95ccd171a. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1672760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71e2bcf47a2e1b0d617e14a60c4d97ab42c9d2d8f4214d7dc37dd2c7e7bd73b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1672761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1286b4e47aaafd27954a2112181ed233444b5d25a9cfe10e8fed5fd66d122ed. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1672762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c10a3986547270db02086aa879abcf09f1e21e3822182a30c1d2b5c131458b4. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1672763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f3870e7675177d98a38771fdead066e7e781499ebd04ce6b91bd3fe659721c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1672765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d6c21cca954e521d2887c5756ac9fa6b1b2913a5b819e3b358c7b6360ff0f3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1672766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a429e074f5c566e004b4fab5b7fb4bb8ef74c461412a8644165241ca0ef1cf3. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41695168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de23672e4af09d8527526d93f0e286dee6b1dde4df03badfe962c595d61989e. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41695170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ad70af73f30f1082dfd65004a913d661338b71165abb9ce9f8ea81637d8e0a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41695171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb705064f1905500220b3b25681a72399aedb11b3b421b60fa764157a829316d1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41695172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7aa4ce3eef7ce0f4812b953da0fcb88c82b425995cb9c4297709119cff8344. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41695174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea6b11266d50991bcaa36695066836d6032f3b66ee0e6e00c68db0987bbc6b1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1760695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df2059b200cd43a35157afb6778ef9b9012174637bf07ac932d5debc1fac615. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1760697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351b1fc5a45141badfb84bcce23b7db1f04701d951d7a589ef6052a226bbb4c6. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1760699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7895d7f7e25351503d36e3601a427b0e469689851abdb1f73634fdb604684a2. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1760701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dec3b51a59bf4b61fc96d1a9f337058b11d68ebd0697a3242afe7e367836264. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1760702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a15872a230ca60041bad15b5ad14db656753406e5420ba425f6d4cce5135f65. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAQR41903608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f638245553d7700f0a5400eba4d6939e98b00f88d673ee4b41bd1dcc0bb349. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAQR41903615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6aa6cb9f5cb41bf04741ce811531637dc8e3a009e0a40f0a1db2f35e8352c85. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAQR41903616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb340119522041d0b92774d5cda75a73bff2e86d245504a7f03ab55de1b6a26f8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAQR41903619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d7fcf0877bc188db18c134732fab04271ac3674ca9f015850b39428d7a96a3. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAQR41903620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4540d4478f88478fbf71946fc6895a34506d82f8b302ec3243440810ce7d18b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAQR42004291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fd889756cd024825a7ab1531dca0db609e4277b0d0b069717f4e97436896ee. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAQR42004293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7db4f65d99558802504bf6b362f2c6c78540b8c9f9daba80716e88bba117207. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAQR42004295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5c256389d7edbf5233ad9d73b325e49710345de52724aab613f8985150a775. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAQR42004297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afe3f93030cf2fbc46c4bf1771db2b8caf236221b7bc5dec733295f7cf2903f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAQR42104534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45ff75a09fbd1f22a6658ea67d273a2016340c319996ed7105122f95b685854. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAQR42104542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4412d63bfed64ea0cd2ed20754be31fffc75097b5ec63c7cfd9ee8139244aff7. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZAQR42300914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca2f9ced8d82f4b18bc172a2dda6468e5d733fac0caee020a64bffcf1a7ab5e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1862020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5158d8d7e31e9c1bc60564f0af548e21b5e016ebc50cdbb89d9ee7518fb2f0f. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91855818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c9887b22a0d97fe2f8b475d8dbc63400cad7dbc5a5ebc989d31fed6140721e. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZA61A1405909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1faaed386039fd86435a73f8b12b406fcf1cf7f442e2f7cb6d4f8f63bda2d4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZA61A1405906.