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 0xc34c125d7b448ce32772b2b318a3546029c8a8863d3f1489485abda652ba886f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/134112fa-5ff3-40e6-b26f-b0384b7b30ff.json and https://artists.proofprofile.net/proofs/artist/134112fa-5ff3-40e6-b26f-b0384b7b30ff.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 0x7753e2fdbb3b8db0cba8daa1c24b55244ff84ea9eff8e6a95a5f0fff9b805fa3. 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/HKG732428171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f0841ad91c4562aec4587c92120b883d89822de8bc2a6cbeccf0d342963fe9. 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/HKG732407311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39a87cf91ad5b862eff6f32a786e3543d208a373b1de28e3ddc560fe32e0353. 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/CNZ632400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305537591e910463a07b9fec0713da86d769b01edd0499719dad5f7e1c58c577. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/CNZ632400030.
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 0x9d886097cb8ccfd9be3b97b467abb626e2544f96b3f2a9a94188c40c28f67234. 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/HKG731678460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1338ad8b257a01e1820fe9123b4162949265b8992c52c9c41aa43db82066ed. 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/HKG731678359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc6f5e570d3c461f42403045f75fb692d975d27c433a8deda5f60c012137b87. 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/HKG731678470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69408d23f079e61b0dbe7422713f363034dcc68f3e1e0f172f9da82778d7098. 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/DGA0P2346273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e9f3fe457bcd6589969379b40a7a32e6f0ae4f286a526c644d2f273f7b599a. 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/HKE022215189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596f8f249d2ceb0f1bc56eca6c46dcf62142f6ef012a920c856f43f4728816e6. 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/HKG732358415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73beac55ad2a01ce271aa870658c2a065ae80576f93eb3e854b391ef4f96a78. 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/HKG732292158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b305c147fb85c90f9676786ab8eea7275ba8f5c82301b63914aa411546a1d8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKG731600107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029bdb59dd74691a2ed6a3f00dbed5a127f6ed14fc778fe75c4a0fbe9d4a97a8. 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/HKG731600108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a6a0b9fea99d26d2ae72f8b45ced2af73ca01b5205e862e6a8c96c81970ebf. 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/HKG732313853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a5519e74e94c650e1a52712033f3ded4d470d968f82af4f7b4478c40aa24f4. 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/HKG732229673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe239830b3c801b4521c74520eb05045b579aad2e76ad72076a12ef2cadcddb49. 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/HKG732261776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dfe16ae80c06ca12765f4bd34cae0e873091056845ff79200514d3dc289334. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKG732203447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c54ae3dc5441f72e3a4f6d8ab0f6ef21cd60b20a6a9168252398aa3ab9f01c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/HKG732203517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fe5cebb67469b01b3a2375eac068fa47ff5fc3372a444b1f11778f52d2a5c2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKG732139825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e21daa68de3033177fc06e1e3e9ac0f324870a8a19b4a56c6fb45eef6f0128. 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/HKG732128122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580fd0b8483f1dba42c358506b0f88bad4af8eedb219475fc50a688b2c3309c3. 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/HKG732314117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516b5a2670160ff26a8f015c6b3e75fd7d5df4f0922562c567ee17b517d380ec. 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/HKG732159588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0904566d3b1779bee686f44480c77ec532e9abb7968075bd755da03a6798672. 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/DGA062078654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb986e540a8ff62f25bfec2aba51a2b64a3bd2bb420ba8d1af2ae399b31b70f8c. 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/FR26V2085695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a651cc7394821a1500e79b3c89f606a1b1d044a21b9fb927281a94773ef4da. 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/HKG732040068.