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 0x334b46850b12ac2fa57cf8d7631f5c25815f8969052acbe14e43a3addde961fb. 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/b497791a-ec9b-466d-9a94-6c4407adf5c1.json and https://artists.proofprofile.net/proofs/artist/b497791a-ec9b-466d-9a94-6c4407adf5c1.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 0x3712b8a19522c4a152f59383980f93eb3e00ad4c0cd1dc7008d6223b500278f1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAEZ2015781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9208d358cb462f1992263733e9e0009d0ac6aa6bd7c9b9bf3913df5e80a4665a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZES51961234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4e00d7e81548e47222b9b518a4f9b21c317c0a7cdbcc559e26b8899f759c7a. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QMGR32182007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8142c3cf34ef5b2b6cb67345686f8c677e7f132c10ba928bdf666442e8d648cf. 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/QMGR32260680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c4a6d791df34193a8dd354cd9a78530fc604551103543c598b7a1244c49312. 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/TLREW2221994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d87787f99b5f0e92adadb0d7a5ef10441250bc831105b3556ceeb2b33b0513. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZS672281343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d8eb1a28509ae344d54ca7220e4a4e493da9c397728646e0089486d7024f22. 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/QZS652218921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9a49bf699bde357cfc5179eb4031ad46d0dc5da2ddc05caccbebf6e4884192. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TLREW2220325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9a49bf699bde357cfc5179eb4031ad46d0dc5da2ddc05caccbebf6e4884192. 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/TLREW2220325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953d16cfc3f73397d8a43f8323e3e838efa39b331e32e2dd541fa1dddd8e5247. 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/QZW9N2257984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4f6d3f9256b8f1cb033584eea030fada3017ee2f44994fa58b9fcee74d5261. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZW9N2257985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bdbf0783e924a394caae33984d13cf96e54ce96888687ea1f1a54636c57617. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US7VG2377176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509e02128bf227336fbbc6026fdb3c4a43f5ec64b0a132e066dfe272d71ced4f. 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/QZ5AB2304013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff22e7af0d94e5270ba703726f787aa736b83883b8831918b267d919344b313. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZNJW2309272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f44f47aa3a123921481918181f0841e7533fcadeb704f5b69d0f608f9918018. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZVEM2386689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c54b5d5b5fcd23894b2cc39b54c5e4c087c95e86ca1f082c7ab717f35e948b2. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHN62494154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41caf70f2bfed135d76de8db2139d53feede3e1ed282f54c684df0c97fafea60. 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/QZHN72414403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bbddd122c553b2b6149393f22f77d7483717c3d981f58e3120be0b03e04855. 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/QZK6P2426255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23c49c75fe340e0587e5800cf8eb19c43c17dd7cad98f9296418fee23042ff4. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-05T11:01:08Z), 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/QZTAW2439549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd896678ad3bec3b9d3433ef644006c7fa919433ec628bfed83345a1826c6cf. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZWFH2443617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3118690c546fbd30da4597ba3d0e6f2c436be4c9b432588bef3b856775208e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFL2489799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6be12e110554eab809b2c793c543fb46975b5eea797ea867280359d55f60286. 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/QZWFV2476653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe398ed5d6e047cbe0658e0c7fc69bef127ffa92b6f11513286276ae465ebe323. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QT3F22434635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc73d4c424708ce5a05b8c7ed849bbdc1a0aba35a6fdbf8a953eb95147b91788. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3F22434636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf96576ecb9ec1e6c9c8b417a1f555e38f5006ff42e8b916ba8e2cd45c0c747b. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QT3F22434637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d265d500edaf564fec185ac6233eee985c513c427424b43e997a9cb6dc2276. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QT3F22434638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ad5cec8857a538c1b48b898770d1fea60426db0db3aac6b09edafb9d4f6dd9. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QT3F22434639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a02167c301ee0228392ec2fd04a780b4b56d87b73dc8e80db387ce732570b3. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QT3F22434640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa647528f9a8fc94c9ed3ad2fca1600126c8933b3fa8915697c2982d82358be. 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/QT3F22434641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a1741151ff4bef7919bb12a58aa7fea02b99e73a07928d659fe4864bcd53dc. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3F22434642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807d5016df65b2c3e3af562185a9646d1b71c5e09bb27de3ca2a87360e6d3374. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QT3F22434643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719dccb705db1d47efa87d0f108c1923decb98e81db5cb8a94edbfe467d72c4e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3F22434644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5926e424de09804e44c8ee0fbb21882cb0da5a672b566ef04b75d88e3aa63c65. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3F22434646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9208d358cb462f1992263733e9e0009d0ac6aa6bd7c9b9bf3913df5e80a4665a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZES51961234.