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 0xa6d9a8b804c318cccf915679ecf495b508380555d9d45dac4e16c5371a7b638b. 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/4c9c6115-743e-4c69-9432-c61561cf281a.json and https://artists.proofprofile.net/proofs/artist/4c9c6115-743e-4c69-9432-c61561cf281a.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 0x7bcb69e8565a20a59d8fcbc45ce5ead99a755097781698f28998ac1a798b16eb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GB5ZK1900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd365342160012864b2a3149b5b55e9ab0fa746f3017b160abde3882102031e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GB5ZK1900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e0d0b1ed9489a636cc8a7821779c34869777e3fed61c63547634c387a177ed. 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/GB5ZK1900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d6c4894e3671d61a26b6db7e2fd4d8863539fe6d78940c6fd1e31850973da5. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:02:24Z), 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/GB5ZK1900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898f3eea82b6568732692dc48dc5314b27a9e06d5998355e83c85d2348fcf1fe. 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/GB5ZK1900042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2223b0432ec84011cc1fe839c68c76b7fec95eefea3c243fdca17d5cd8bc3a. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/GB5ZK1900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d04d79102c1057c4bfd56b89b6d5bf82933e958fe81200d442ea6f2f39a4162. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/GB5ZK1900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0871b24f5c8dc587ba4a386e5f378914b8221adacfb4ed5d9bc522d47706598e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GB5ZK1900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc660a2af9258518980e5f49c1c2cb095df09338f782fb73022862631ef969526. 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/GB5ZK2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3c6a3d1c48a7b04aaa8ac722ace97c96c28112e7ba56a74b4c96a792bde4e6. 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/GB5ZK2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe484c35adbf3ac1e191c21a2be556c6db449dba1fb133e1d9f414aea14ddb386. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GB5ZK2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c282818a24e4dadb162717cbea3cca6bd87754bccf327e6d6239d328db630e0. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GB5ZK2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51d1c8791eac65a5e1be0d15ed3efa1364100d194f84ffa0e6731f6ccfc6e46. 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/GB5ZK2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c98b39c4a1e5ed907a6c29c572f339c8948dea3d3571fdd393e871ede1c7f96. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/GB5ZK2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552ec9f6423b4d56e1f5b19e5d88a68305db3ff9c5127d76b1f63c8a8888de4f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GB5ZK2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50029bc6dbbb1ac6085e84170d73b72bcd10cffb9197e753c9c75a63bfbbb21a. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GB5ZK2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe484c35adbf3ac1e191c21a2be556c6db449dba1fb133e1d9f414aea14ddb386. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GB5ZK2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86d52ff9b463d5a12827de712801a4478f0764bb96123af57017fd2c82dab58. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:22:46Z), 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/GB5ZK2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86a1bf56011fd85f8d9ddd09b81866a0cdb1bdc42d564078d95c2880ee3300f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GB5ZK2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c652eecc1f6a54eaa8b56681f75a045cd11a6120e4cef08076b1db428009de. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:34:44Z), 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/GB5ZK2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fba6f46fdc5dadf0baafa2d876df91699899bf3d1d5f883be87f76de34892a7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GB5ZK2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7f57ee955fe81e89cb48cab3f13d30e9d451fa64b829ac09970968c4756f7f. 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/QZTLA2376178.