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 0xd148082e98bf1e603b333ba6dc4e7d62179e586f1413d86ee51c53fd33a2f8ed. 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/59426616-0b93-4a99-911c-9ce1637f7d1f.json and https://artists.proofprofile.net/proofs/artist/59426616-0b93-4a99-911c-9ce1637f7d1f.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 0x582fd19721424d2586b4f120e1f056d7cdffa7233dae70a95fa897d78329e07e. 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/QZES82251560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a7a714450c96ccff411b5be02e76b5489161506de60c5966920da31cc7f92a. 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/UKXN22346845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c396523e8d3cb5a4e34ae35694881d179de48dc6ac590791ccd0d5c52d1871. 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/GBLFP2369740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889818a34264a5011de5d5f8590130a14531309410888700c552b4cdfe35091e. 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/GX3Q92323311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd6a4d7366215d76a4ae59f601749283641bc12883b7624148795ca6437ab6f. 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/UKXN22294758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3fb80d8836b9acdcbf70dad103211b5d856bc34655a5de9bc0a7fa86d95eb9. 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/GX3Q92097636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b34cc73ed27af02b9ba9d1dfee6675a48e61da7729d353c2c52018db7d531c. 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/GX3Q92097637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2818dfebd812dfcf90579344a2da81edf223d1bcb75bbc66e27a7155a77535. 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/GX3Q92097638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446c87cc3b609a9903c9f644dce0c869fd742562a2f20cd82b25f74763fe0f9f. 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/GX3Q92097639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30d6c4633037eb1f7d035b9cf533b35b53df8396b1a1c6ed1f600af8f33b7e4. 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/GX3Q92097640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6f222dcd8d5373557bbb1d6b65c5fbcc88160c2fdbe4b1eb68d5e11139e341. 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/QZPLR2221179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b5f27d634c9893285d3059e7b934e22f3546c13b120ac97b3b00c062647355. 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/QZNWW2288023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0880fa275d20c8e3ba715eb35ed425f207579c45352e65769359defd06c865ca. 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/QZDA72286628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387e3ce38883146d58a145dc1410e78ee6b34ef0158f302d2adc6caa6864a6c0. 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/GX3Q92096766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3b404fe10b246a851c7ec50966be74b06afba368e38c4f5f678148b1d52cb9. 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/QZRP52151720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7904ce827ae212de6698d7b022b9f00dbf98b1cf36d09359806c47b707be0491. 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/QZNWX2135193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f8c4c4520d7700e0658ee8266395ec47c8e9b9dfdb9b5b6f481945dd66f493. 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/UKXN22289702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9326756dbef0a1d0122259edb59eeaddc671d450fd513bf88e6f8e9b70610e1. 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/QZNWX2135196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e2eb8442b36698429b621f986c930c5a0d2348880cf47f24101c3e58700697. 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/QZHNA2395006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca36e6b0d9a548e2fe56084801051700757fd00a655c22eb047ba04a3cdfb53a. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:22:23Z), 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/GX3Q92422434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02950b84a007b6b415c8045e3d2e5e376227667eb4c09eee84d982eec24c459. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:23:03Z), 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/TCAHZ2400599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853c847c45965ec981090eee795cfa1be8708aad67ce54202a8c84a884b63b84. 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/GBLFP2425022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd680f69fb5873ffc069e5626cc45d58c2d62b5f75762aeaf0f2cf12ac48880dd. 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/QM6N22576011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73491a4cac234c15e3886c42b2c41942b80343e0fdc50c637d8c7ea2607a7f61. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLFP2505334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8559de0a1fd303c9308ff64ae65c2bc350d40b13ec5580190303c03fd8427a05. 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/QZNWQ2533545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d285e2ed5e4cb5b76e8c09f24a3538315c2cbc287e9ed14ebb77c446cd977c. 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/QZHN92239723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4921e94d48469aab677715806bb3c7172d44c76f40003388abb3269d8322d7ce. 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/QZTLA2482535.