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 0xb1d2573bbe8c4fbc09a72663e0db773a4ec850fd481cc08c24ba5a83e71f3a4c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/283804e4-9d4e-4a59-b2aa-c453109fcc5d.json and https://artists.proofprofile.net/proofs/artist/283804e4-9d4e-4a59-b2aa-c453109fcc5d.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 0x0814b91eb45c118e80d5e050ee0baf2bb041b08cde811368c532a5496bd02aac. 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/TCABZ1408170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf70b76ad32223a72f00cadb38fae9d96da0ce16a540556083ac769d1544126. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCABZ1408177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7af3bb07c75f27468c8c35881208d80621835125164dc48c069351e04c0b88. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:44Z), 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/TCABZ1408179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa49249f769c8d71d36070dc39ba147db6fcaea8f890e9dc53db5fa19aaba4b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCABZ1408182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a8da30f31afe385ed48515aaa9f18fc1e3ebb4f9cc116bde51c4c090d8e2bc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCACA1425669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02269266f41f089773ced29ca1971fc57c040a577594d2002b910be250d53ea. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCACO1624750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a24cc37cbd047b011c9a59e036cba500d5d607e3e0b286f727e09b35041efd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCACO1624751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd31ed3324f456d397471c114b1d473c67d44f494d5656a86442cd950f28100. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCACO1624757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53bbcd03c54be6b9438ed9581e1d471c0c286178addca9d601728d2b4940575. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:58:43Z), 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/TCACO1624764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87461b4170b183440633496cd0adc919d8389a00697e5a03469b7c4aef9324f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAEC1935448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6a1becf41c1c21777e4af9c0112b75b3cc5ac1e86811a4f2dcdfea1880ead9. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/TCAEC1935455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ab784b87e025144c84bebcb97289d69f1f8ad97ef305778be3f79bb173e94f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAIT2475157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514b37f4ec1b026acb14ecf409e743e42a10b385bf7aaba197b61571e3937b0b. 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/TCAIS2475173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d0955faed4167186a5b6b1022176e0411397962c54b185d5383228fd6d022d. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/TCAIT2475187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6607a7ab48c7a4a322080e655fb751e80b614e0213e60c6f01f35178c7783d4f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIT2475196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e2e93dabfa662834b4ac09b368dcd29f8eab2ee1b447be2dab4fbd0534c883. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAIS2475202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06edc86b47925fa4e1bb81d1e6fc054cb16916c245025e8446b51c2ef56ba9eb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAIT2475208.