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 0xe3ee1611c6e03326e302a8eac669887b28ca872dfeb8f93af67bff00aae88da3. 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/249611fc-b477-47a0-af4a-1328f6edd3dc.json and https://artists.proofprofile.net/proofs/artist/249611fc-b477-47a0-af4a-1328f6edd3dc.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 0x99d16340679a3e3510c746bf9eee19677a6814f9c06e25f0fd559e9d07ede25b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPJ32208874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f294c94fc061d53eae2e09a3635c01920e766532457b0aab8b2c99de8648eaf. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPJ32208875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcd0cacd876e4605456b8ae6c8d3a8af090a678fffbd42bcc128c32a55464cd. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZPJ32208876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ece53c04d57122aeb6b982f6992b83de13082ffbcc0c530c113086c6ebd4c15. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPJ32208877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d16b8a95a538ca00e25f6fb7c39fb22b92db94e43080e9a615da7ef6cad1d3. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:32:04Z), 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/QZPJ32208878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ff2fa3cb789ad761e750b52033264a70cf0d018a53372f0c96422fc03d0339. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZPJ32256608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b57b01a4e531bde40a981ae1de00253495568dd3a5642be9ca91db916e1ebb6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZPJ32450006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99927682e2c59c358d377bd050582f92d77d3359ca419d82eda519e635aec263. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:39:56Z), 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/QZPJ32450007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72d12db7d0da439e16d59f8f04620264f6e3865147f32eb700e5bc34d88fc1f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:06:32Z), 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/QZPJ32450008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7432c5e1b9f7192ba66570f07d79e11ef7230a1b6da20edd3caf47c0867cc8. 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/QZPJ32450009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dafc955a0236bb61d65a0a143c282e1b9635a93b138b93ed6975cfa2d495da. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPJ32450010.