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 0x36320cfa2352d325f20da6ece539f79bf45559b24be9fa91055dc057a596327f. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28e9807f-3e2f-4d08-a71e-d31d57d822e2.json and https://artists.proofprofile.net/proofs/artist/28e9807f-3e2f-4d08-a71e-d31d57d822e2.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 0xdc30a71e597fea8f487af4dadd1748f9b20aee6ecde262d40d5267950bc1f9d1. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/AEA2L2105158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f1307b422fa2ca82c6a8fec9439a6b14f737579aa10cf49210457824b4c655. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/AEA2L2105157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dc4f31a2aefef4c9535bb6acbd63ec148ccebb7f7c3b63f7194dc7485c380a. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/AEA2L2105159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfaa55a35f8a29bab2720e0cbabd5db0dafec5e2f5905658e4208151d19bfd8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:31Z), 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/AEA2L2105156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48725f3dacb2a1341633cba889646a71c6fe8dccb03048311a0fc2237460fe36. 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/AEA2L2105160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7a1bea85a8405f430b78bd57548625421223d67bb9892a474a161babb0d666. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/AEA2L2106037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3be81c369c5936f25e16892b0635dd97163d9f2eb65b59faaf55a6edcb702ee. 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/AEA2L2106450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5187b43bf12d62b2a1dd173556ffea7c59cce073c11020af54d369783f0b70d6. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/AEA2L2107151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf650d735837f395062744ea7d9c09f388e66db1dd5069b8c446e4c696fc7b01e. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/AEA2L2107149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ec18ce064cf036c921f6487397130b7c2eaeab9c40a05924233bf452012a1f. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/AEA2L2107150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa568c7b0fa68fbe0635f24a94087bb06d8f6f26f3b797b9d323569ca2088d718. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:19:38Z), 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/AEA2L2107153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1779199c695330328e51548c6348d40042c5c15e9424f882839adca85e11a1be. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/AEA2L2132699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242168f057ccb8e716d65a1354f21637ed119f8852a7c5367fcf8369281e0c90. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:21:44Z), 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/AEA2L2136845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7be95c227dfccae6306929a358a9a938efa0572bdde6a1f7a2d4036a1e9d984. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:56:20Z), 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/AEA2L2140284.