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 0x8749bfe10b29248e7e281ce88fee2bbf413a8b2388985b87150630f8b9016072. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2913486-597d-4082-9b10-f66e217bdba2.json and https://artists.proofprofile.net/proofs/artist/b2913486-597d-4082-9b10-f66e217bdba2.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 0x9d3b3c3687532f2a9337ba18da5a5ce98deb1d0f14721a253a0f18402e9556d4. 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/QZNJW2368448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05f305787d40df2f1b104dfd6294866b6b2dfa867c27104b97ab25d972cee58. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNJW2368449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ae831e2dab7d04d19fbb6f35b7bdd5c0d82732526289bd031cad9ce745aff7. 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/QZNJW2368453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9460cabcc86e172b54e83e6deb1c80a865025c52117a42928ec1530b3cc0e692. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZNJW2368447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32fa1881d78cf98183b458aa7e3aff1175fc2c404935f72b6fce80a3787e6a6. 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/QZNJW2368450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0388aba965df2377e533e8fcf4280d5b2982eb54b29a2497f0f765667486e31. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZNJW2368451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124488140e859a3708b17529286ed5c5f5d33a645e566bdfe2f1f5804663a9df. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/QZNJW2368452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca046e9a2cde81e527446b622dd48820c5cdecafed25d64651e7c8fd796b56ee. 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/BKBFT2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d327d8cdd21398157a45b24a067db7473ead1d9fa2eaa2b50c5fba89e72e63. 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/BKBFT2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b03733bb0d218a358f1033adcd6bfc59ef6740e8238c58aed156f012c6fcea. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BKBFT2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b607b7c61401be86d93865fcd6aea70ac5ef0c9c9df13d34d5d628e9f66660. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BKBFT2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5499662357cf7c37f93ac8b8fa8592cee4732f0cae90af254168deb4c4f28c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BKBFT2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe527f589705172724c3459d86372c79c764b9b0c0a735d907cc0bfb975ec67ec. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BKBFT2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3546994d7a493230622f29073f4c330e0cbb063e9756a23f2fdf1cc51ea20204. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKBFT2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6d5d24e62bbaf7b386278f1ec46e26a7988a167e18d80456a49ab53e02ea25. 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/BKWBT2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46ed26ed3857817b9b16e247c2bc2eafea7adf004fabc93b607055619bd51de. 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/BKBFT2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66f46a944875ba8edb284413e7bf7bd5a7a4dd7cae66f17e1a1afa67c4e5076. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/BCDGA2200001.