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 0xcccfee1faf4a8d49e945b0722ecd89a2223876c968999b9d823ff24b9020bd86. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fe78fec-ab2a-4497-bf7f-88b7ca1636c7.json and https://artists.proofprofile.net/proofs/artist/6fe78fec-ab2a-4497-bf7f-88b7ca1636c7.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 0x6b2b677922207e706ee3e3b1a783840dd6b2e7f47e62e22e55c826fe1f9af8dd. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLCK41087837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8345aa445886c5257fa0202dc586882770bfdb5b3a25b59d921efc1cdd52695b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NLCK42227229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fca940b4176a5b69c248ac83f63f196a98c38804d80137b250789170088f787. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLCK42227230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd299f52e02a4c748f759d621cd6904ec1734407ddba30543140d160f073ef922. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLCK42221502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a9486a09bc22b4466e9b8092c77b6f38c3efc97d2343b5a410722784ababe3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GB8G41200601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14d7fb763aa76d4444c67d4db08744320c4af7fe88b2df540d493f78ed26c43. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/CH5562500398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e6e6e18b40aa9c854f26077aa723ed8bb93eae846cd0fff45b382eccb7ca15. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/CH5562500399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77eb7e5ce076dc22648af034d330c3eb154a08ba15f3f30d1308c3c8a0a855ab. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GB8KE2502128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478f8daac93ae83fb8a39bb3fa50a07cc7c7e7e900db5300941496737b720bf7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE2500495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2d4773f6f357d5fbb932daf82a3c09df2a20ab6ec17509753aa7cc1508cb6b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB8KE2500498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35c5ce4005c8986b54e8b6238cba929584eee7c022788de3458e472be7d9dd9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE2500496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dca5a057dfc3eb60c36046ed2089051276005be27de6b7ef5c0eb7eea527e6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB8KE2420719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5044699231441ddae7b8756459d17f3dae8b1a646d0f37cf52e6a56e09712c51. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GB8KE2413719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361afd5975514c3137fcf7fe1078214225c5f6069c7140b08c06d9ee4f686df5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB8KE2413718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5044699231441ddae7b8756459d17f3dae8b1a646d0f37cf52e6a56e09712c51. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GB8KE2413719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa433c00a2b80ed77b4be3aea382d8542021221717a191a170b9b8c072d2dcd93. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GB8KE2413720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5591eaf3a9763a3094c8edd0ae30d4a7999c24bac56d8ab90fff4ff4b0b841. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GB8KE2407832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ef3c3cdd1414df391fedcb95d0086c23adcdaa8afd77457628e0538ccc453c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GB8KE2326710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f100f4ccf6929ad9ca3f55b7e1fb96dad1f50a6ee4d9b27735b8103346314f6. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/NLCK42230722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143e343f6b0f524150ae261035883b73754c657d0189726ab16a31799a437831. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GB8KE2308292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a35bf1ba37bb676014391fc038363d4ba14254051e8b33c35e24fce9a163752. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CH5562300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c6ec0e76c9be4e5b67da33e8799440218d76a2c602c7d356179842f40c305a. 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/NLCK42220688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1556d6791a9a2e6ce2e65429741927ac447d6ddbcc86a66f421b3e7a4e6c68be. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLCK42220694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a3807a1a4f2b9e231a290423c862be6a0130ac5ec5093abba2b057baecfb6a. 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/NLCK42220696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986dabb690d3978b5ac88577e85d797543164dfc21c056f7a1bffa03008acced. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SEYOK2433446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa397acd76f88f1a4a1724377f2662c06acf6242df41d9cc1fecb049b60e30ec0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SEYOK2433444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ad41b2bb50d63b8bfd2f9147e3677f312d77b32424b89a6fbb89487fcc40b0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEYOK2433443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad89a8eff911fd9be826f6290458ed0455357e823bd79804fc538b2500eedc0. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/SEYOK2433438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca85b21b64d1fa4b49fd162d0aef9926a1f9072fb52761941eac2c1eaf4895cd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GB8KE2329281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd545cb2e09ea609a0d077e4d2a64b501394460eed3dd9cdcc7be726d27a02fe. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GB8KE2329283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dfb5550922626629ae9d6d34fe2874378bfc541909dea043ccfa958bbf9e86. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GB8KE2215560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd96524b78686137e16a253362ee0b5f9047d6a926f831ebdf6f767b955e7595. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB8KE2502127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad5a12bc9b28a870c26bc977780a37ad53177989f526b44e8dab63e723b020d. 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/GB8KE2502129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f04d64c9be330d409390782353eff628583b97bd4939ce81a3fa735ee41f552. 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/GB8KE2502130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a46e356df759b36fcbbc4187f5679897f17ef8c0f68aeec33f0c1f72cffb625. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GB8KE2502131.