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 0x20ee2f23c4f735baa99c72a369246329f2c346ed7607aaafe7ef41236e0632e9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10ceafd0-c158-40b1-95e8-3fe0f6ed8b7f.json and https://artists.proofprofile.net/proofs/artist/10ceafd0-c158-40b1-95e8-3fe0f6ed8b7f.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 0x4dea45acaba6c655f6a706f48e2dcbdbb942dc0f28f9521639912363f01f261f. 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/ATR981125004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0aad51165b9c17a8c5e3d45f3dd0602c41388643276abeb4104373d686433f. 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/ATR981125006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbc29b3a7cd9f5f41ec591f5c084b701623e2aefeab7ce9e4f8eeb5a255af25. 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/ATR981125007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c9e661a18d140f16cb4f31f00e4e80d6a3fe347e28de1e0a653f808a57e11c. 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/ATR981125008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b845fc21e6edf89c07fffa7f42cf09493a90d8821f2419beaa366528359a6d2. 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/ATR981125009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d59f8aaf99f0ea731b9c45e82211fe06d6df19fa2bf39e93908864c801143d6. 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/ATR981125010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a037c72cf1b3b0a154ee504b1ca10afe69c980cdb69951647e9a7d78a00d5d. 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/ATR981125013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5468c187bf1136d100e0dfde4569f49f863a8a5a4ee7018a2b2e91a9fff0107. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ATR981125014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afc712852c1d1cbde0254ede7abec7185af6f013ae9a059a38d41b8d16cc999. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ATR981125015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4f7399d5618e7432163d30f795a4124148751c97065cee6eca76789776242d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ATR981125017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f0dc998bf46b45c45bbdc82477f3584d7efe40a4ef7fecc8bbb75d4d6c56fc. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ATR981121173.
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 0x05d72de39269386986223f2c34f690084ccf8ab0eb00ce8c8330d8fe9bde2d94. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ATR980016878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce5f4ec16de0653910dfcfb7b779e7be5c3e5e51e29b9ccbc0b901a34fd56c3. 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/ATR980016879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d437bec193e12d55903f8ffeabe4e24b642c694e7eb6231c1f130dd9afe57e6. 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/ATR980016880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2615604622a813ac69552821659738316e1953f21c2d79b3bb0a55f4bf7253. 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/ATR980016883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4367825b43bc89627e287f19d88d352b5021b7643642dd928f25cbaa03465c38. 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/ATR980016884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9ceb9a9ce529416322e9bf401a898eb05f7d415171376ec987c48b64d11918. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ATR980016887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0305ce053a40b5900503750dc3d45eae57c35865a80f64c608a7ea8880be0555. 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/ATR980016889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57747f7e8db9fbf4b4d5cfb22006b332586d9ed1ce752617ac93f631739de26a. 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/ATR980016893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef4025cb63aa3f4eeda09b4e2d8c90bee6e03275d93ec41f9e2354b0edeb736. 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/ATR980016896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdded6d848bf622004c1377e5594ed921a04c2da8b73ad78bc2780e6957a8a7fd. 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/ATR980016898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109ac42dd921b65e4354d90402fa42c7d3f9194468ceb5cf4c9ce012f01b8638. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ATR980016882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49077374cb25a109eb734f3906251f609e411071f08a77ee21a979b09ca2de97. 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/NLE712300476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdb588fed65d46522d0054991bed87524225733a0c638473ee17ceca8fd52e1. 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/UKYSF2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212b63b1942720a77cf711ef93909ac0855a1a2293e516359fb98df7cb1cc73a. 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/QZFYZ2182142.