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 0x4bbddde7ff5b7c5160194c2ead80a9c2fbfe6498d32e63091180e3ea0870026b. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92ee34b4-ad9a-4847-b0f0-4126a82e2513.json and https://artists.proofprofile.net/proofs/artist/92ee34b4-ad9a-4847-b0f0-4126a82e2513.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 0xd7f25a04d5b9c217c0078ce1aa6ceb06b332974d653f30c1bfd191375b3125a4. 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/NLW341400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cf57d1aed8f0c552c5af810d6f1bb22851826562f62f80ddecae679ccb0c87. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CH6542143161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf82d0573cbb9c0b0c82b614030b1d2d5d611f6c7fcf5934d52cb8c2ca31803. 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/CH6542143162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2c34a6adb756a80cfe192a2adffe605f900c4c67c16c2f8c82b20b20617c9c. 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/CH6541667097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfddcacffeb07ee23a8b95c7b6709ff72681010ef7059e36f9d1349e78a31ba. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/CH6542143163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cb770da0d6e2df02346af2c6a9b49c21f8f7ec400bb52786ba3d326fc4acc0. 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/CH6542143164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de94a9dafb2f62666851200c04046d351899754f6c176b54f9a4cb7d58ae24b. 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/CH6542082401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf43454e5c85b5e90072f1aa96744ede431948cc4d1a8860ef550e8be646b8a. 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/CH6542143166.
The Longer the Waiting (The Sweeter the Kiss)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9f1994169b1fdfbcdfdaf2bb9e50fd6321d5df32e02a67c637c9a058880595. 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/CH6542143167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18b2492eb8ed2bbd0a5514094e47bca50ebefac8fb2b049012398dc19ecc831. 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/CH6542143168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402e05bc21d3be9f000072898357f32bbc0476f15f1a90706b9fe22b9dad564d. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/CH6542143169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef36dbb6174a3386978d8172b46802b6fc4f4cd0c1349e44aa3316c31aaaa35a. 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/CH6542143170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac74f845be6f34ba95a3062cc7447804715c19a021b302aa237e6e22ef5fba4. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CH6542116397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db87b7b26348fa17cdc08969d507e1a3f3782baa8eeaec16f8ef58845785743. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CH6542143174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf6370e161cf3516f026c74a43c572e2b8034b84297609bf661f3ffe6dd7b27. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/CH6542143175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dda784f1468a94c2e149f2a5d159acf5b20a822a6aa690bac90bfedfb6366c. 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/NLT3Q2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71740c72ee6fef6d2cbb97a52948a49f941e754046cd5000a81d16871cf28f5f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NLT3Q2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dcb47ef6f5a74c885e844f195dfce2f354b1a603988965066e541f603d94ea. 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/NLT3Q2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b0e2b8364ceaeb46edccc80ba16b5c8fb14aa686a2655d69de07b518b3610e. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/NLT3Q2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7ac73b5950d30ef6e24e6a9e59bc327c9f462aa74ffa7c50c29b101206ab8a. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/NLT3Q2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82821cc320abd81b4b304f6f1c5399b7f1ab8e828178f03bfe941b85840ec7d6. 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/NLT3Q2500001.