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 0xe246f65715625eb90aedfe8d1446260cc13cc33e89bdcb93f58edc142cf79d2e. 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/c46f2d4d-acee-4659-8fb7-8605a37372e6.json and https://artists.proofprofile.net/proofs/artist/c46f2d4d-acee-4659-8fb7-8605a37372e6.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 0x5e341fd6ef1665e62baac71f8918a9456e31b9d17b0b79bef1e8aa321829c337. 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/USUM72001615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54232305d8287825bb96c4b9f9663e426b545c119318c2a4efa703ee6f45dd2. 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/QZW9K2429534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae49a9727fb8f7cf589e189be91784084990519cc091659f3b525d549aad06e. 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/QZNJX2484428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ccb2a468abe2f8e7db40b70df9b54d3aa19fe5d970bdba4e9cbfc45a90edd2. 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/QM24S1914393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999eb375fd5be79491d610ff8879571f9d8d6ac04e0ecf680c9a4b4564da7d91. 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/QZFPL1900227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465d1c0540ea7a3f6eb364b6ad73ed065dd5f46f6b6bbb64dfabb251ec6ff9c5. 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/QM37X2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd588b07ec8154571ec8979ebac3ba46ae9eb8c21171540e77436e7cf23880a. 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/USUS11203199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38477854366f8d3b9befedd61579448da25ac3caef01b08dcb97fa552d2af668. 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/USUS12100148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafa85cebbe2d9a6e41023de8071ac3e82676222eb75a1b8f8f054bfdd6edae5. 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/QZHCR2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8ca784edd5217a703149ab29f9bbe995ed94bde1f5c14b4f8ab5b125b05e6c. 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/QZHCR2500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79713a594dbc61f1454f1cd6ea7e1a402aa46b486262edbcda21a57b86817508. 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/QZHCR2500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfa4eba88132a36c0dfe3adccbc871ccd06c3af4a09a7f2e7436944c118d243. 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/QZHCR2500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92545795d95d02cf57ad79869409ba74193b20a233c9166e5a77648686902a7. 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/QZHCR2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907a46aba2127aea4c799329d880ab0eba7c8fcf57f2a5d5c516dc11e8859a7e. 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/QZHCR2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8401971703ac397b81e585165ab0f5980287864c858b42950527142ff9a8ba1. 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/QZHCR2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58294a5d3712cafee657832f3f5a83adbe6a9ec6f2f32feedf8a0cc9427874e. 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/QZHCR2500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc322a174d1def2f00e2cc6f5a7aaf747784010da43b3dd91ca8ca70fc9c173c4. 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/QZHCR2500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafa85cebbe2d9a6e41023de8071ac3e82676222eb75a1b8f8f054bfdd6edae5. 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/QZHCR2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29edff6d05369269ef15e23185343fd7420a711000be943ebadb37e75b933712. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHCR2500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae91f2637fbf287feed0287cc48a39376913a649e3fd90f27e7d1b8d3bdc48a. 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/QZHCR2500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaab5a8f64729fbf3cee208cbd1dd05a86703eafc54a098eb78e6f5ddf75084d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHCR2500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03a16bbf6dd863e759e549662660bca2ac2786e96990592e99008599d5ce53b. 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/QZHCR2500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb2bc550c2899f318a86d9b236973aa859d8c9b2f141f49c247da94bd4d2ac9. 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/QZHCR2500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945af0849adc01a68f157b65f2ccfb94c9e4aa480b656eacba76359055931036. 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/GBEWA2500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc128666ba0e264cdf07a03815b893f3fe563e62948a502db751e0ec3880350cd. 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/GBEWA2500061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608460cbbab6ad7a9fb8447c85b8c72c3b74c4a3edebe69c1cf8f1ae6a49645a. 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/GBEWA2500064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab5e8aa8ef42378ca033f610f53dc1e4625a8655a393104b04f75a9faa9d62c. 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/GBEWA2500065.