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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951b0c03c094eeff19d2d4022f469ea37cd82f3d7f61ac4067e6240045437245. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8139051-8fc9-4a64-95e2-c43bb325564b.json and https://artists.proofprofile.net/proofs/artist/d8139051-8fc9-4a64-95e2-c43bb325564b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f84a6772103efa4eb2925896a25c57c922ea941aec2ca821feea2518bac66c. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/ZA5YG1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a816026b309a61350c507194d55270002df11f7f1f5af11915aff74f1de1f07. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ZA5YG1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c112edf00efd3c3f673849cebcc20e073638ee7ceb93ead0a3dae6b1907c672. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/ZA5YI1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ff8d8b1419b2c15b27c6a7aaa3569a327b032d03a4acf6ba69b9746386d501. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/ZA5YG1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b45e571b56591978625bb4ddd1d433a6ed6a8d0013668681a1c9b298c66ee88. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/ZA5YI1700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7841d958f8f82f9db6829506ba7aa9faca10453aaf67047d1388ca434407ee. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/ZA5YI1700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc354d388f9c708b41c50a083f8424b962008aa98528cd82d76a1aca4f5a34a. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ZA5YI1700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96992e9fabb1e87636a07951c4070e5980b70b709c946c94dd52f27f2c3d847. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/ZA5YI1700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c705f049b7fa94efb99d5efe41fd7cd4dea0b6d5f7bda8513a329e4b07e681. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ZA5YI1700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b0775656df0c9580eee1fa4c8c953ca14d2fc4e76648f66cee98d1347b9abc. 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/ZA5YI1700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1906270197d6da04d4212eeb85b0cf5f356c32e52fd797c041d7c9cd08b042d. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/ZA5YI1700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b45e571b56591978625bb4ddd1d433a6ed6a8d0013668681a1c9b298c66ee88. 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/ZA5YI1700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c705f049b7fa94efb99d5efe41fd7cd4dea0b6d5f7bda8513a329e4b07e681. 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/ZA5YI1700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b0775656df0c9580eee1fa4c8c953ca14d2fc4e76648f66cee98d1347b9abc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ZA5YI1700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5e4f75a101280bc9ccbf986b3e5e8c0b48ca87117f3737eba3f61baf65a51e. 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/ZATCH2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac5d3a0015fc05a34b144a61bb7b8bf9c53a8810ed97505e8ebbe845a5a8a36. 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/ZATCH2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c260e6425626ed804c24e1bcfe2f2c22d436aa0c8b9386cfca59a284ed7179. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:56:01Z), 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/ZATCH2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1664f37daa39079dd854a6b923f7177443ed397a62e0dc6bb79d3d98e7402313. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ZATCH2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ecb55cac9e0e7116d8ef794b447047229fd711f6e606cca4129be12296973d. 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/ZATCH2300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e48d204b531971a1f4bb30ca2081a2a63e38c4c80a5e5b72de0a81a80f15d8. 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/ZATCH2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a88349d7b702ff50e4c7d15ebe19d0ce8410686ae4543514808206695b2b91. 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/ZATCH2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6790541d96bd302e1e67cf37b898b5dd5bb44ee2019e464718c3a32d8095ccee. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ZATCH2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa129cb5a0812581a981e7f011d1ab42793a9e7b73ff1a09dc34b52332c035a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ZATCH2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9be2137784906245cf83aad2f2e98d3993b382a6de85ae6f728b7ef86f50989. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ZATCH2500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0e9171a7b793f76ff558c5037058e82029921abbec9b76c82035c45d0866f3. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ZATCH2500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccaf9b94a6d9ec89d837c34dcd88dabf5f13805a35a89b5cca36957c0a1424e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ZATCH2500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fc18ac586ee0f1f704932ac38790865445743d20a8c564df1505828a0ffa0a. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/ZATCH2500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5098dc2320aab0334f5b86062fb4040b799c97aeced57d86775878d3b7d8425. 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/ZATCH2500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4643ddf3cee8dee0c0a6d04faf21ccb18ef2cd16ee42ee71b3055a550cf6d2ff. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ZATCH2500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa77706040686f71c8388d45e64c2887747ce703e5d9b6bdbcbe36805ac9316. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ZATCH2500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b262c683c838f9a48bf1098e5ad3fda70711290b25ab548bfdbc50c14cd1954. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ZATCH2500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a64095c204c82b510f2b361b82e83dae75b95961757ed303f145bf021b98941. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ZATCH2500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fad20616cf71390ce152ce4709d9a0f9c18b8bdda7ebe69d5eda4707c131df1. 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/ZATCH2500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126f69c6ae0ec3bdedf6d51ea885860e37a9c4f0b16052fb6e1b46efc5e1f78c. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/ZATCH2500058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91ec4ccdccf9cf0e3e8a45fe5a81f9e0f5e898be37438f34c87c7bc6d3a7802. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:06:20Z), 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/ZATCH2500059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f65cfaa82b3ec468c31c1634ddac54db7cdb95637a2e4f677f9e7ba76ab4a7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZATM52000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c42b0ea1fc0258da29fb6ffd373713bc5fed1d0ab13b74a32cd2070edeb3b9. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/ZATM52000005.
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