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 0x227be8a2b714a5915034050577a73262ac8169a8919ff12dc5f878dfd0489f0b. 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/2d79c3d7-4250-48b6-a542-743305da2d02.json and https://artists.proofprofile.net/proofs/artist/2d79c3d7-4250-48b6-a542-743305da2d02.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 0xfd697e68657f107c65ecfa173b37d3ec8799d09d8a6121ba0d2b4eab47ddd362. 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/NL5UZ2410769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9260e67854fcc5ea1b928e5bd6469dde85925e2e1c17e5e6e2935ab86f3687fc. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/NL5UZ2410774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c9a0139c10b62774e4101b5af9184a019279024e034bf2082dc286fc4a9b5e. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/NL5UZ2410775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b524388116bed4ee011e085bf3cad5a6770fe323b3f488a7ff5e9a2f14a58f6. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/NL5UZ2410778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd228f377ecee2f2be5a8303a9acf24c4e3c92176d0e259e81fd1f868afcefa. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/NL5UZ2410779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eef5612b574aec90ef5625ee052abb499f14c2ff8025ee155065a88cfa34ce5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NL5UZ2500558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a2865e01048616119bb7565207c2e475e878c387240de85191571f305389f7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NL5UZ2500559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4af0fb833f2b1edc8e8bc2644d9d27af4849bf01f6705fe4007d3d2af4f97bb. 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/NL5UZ2500561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4065287c9c8bbf8e33855ff8bb66294bb4bb3c8c24e0f34e28c2362cd91c2615. 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/NL5UZ2500565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba05085ea352ddb68b9886d1a658443ee2b59188a518abd0026668ef56d09091. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NL5UZ2500567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddef56050480dd5bd87ef840e706dc330fa4427be0c61b3b9e6f8122f5865883. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/NL5UZ2502082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d825e379f797e5fc2df8e6d86b84263274f7815b18111c09c0f19920a5fa122. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:07:37Z), 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/NL5UZ2502083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb067dba404b9ca7a368cdadf1472493ec87c3dd47d4129a0931469243ee358a7. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NL5UZ2502084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6b259a47539bc7e5c93dab349cba0b37468623945f66f4dce1f05358b45203. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NL5UZ2502085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97704bacb3ea10fcf9c1f6f45ebffa8687189141be4526da7669b937eaedcce0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:51Z), 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/NL5UZ2502086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa203e27a8439a9f96c3fecd472adbfd30ce94c932fa08ac94d4c8aa84822f508. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NL5UZ2502087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17231aec597bbe1cf4e002c2338435d23bc5044ada5e0a636dbcca75c42f33cf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NL5UZ2502088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d08743f22f3e7c6fcb5d0aeaa52b02ba8619f0d29e3ad7b9407667dc54fd73. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:35:54Z), 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/NL5UZ2502089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5fabe0880f4ce575789f872f2bafdae8ac169d1dda447a833dc74fee30903b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NL5UZ2502090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4caeff25351c87b407353967e0ef98d33b362b5d68ae3f510954ffd49f4436. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NL5UZ2502091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f66148edcece909f8bef59b7f69df27001d52b451dd67d1870db1bb5caebd6c. 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/NL5UZ2502092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f9a3363373b60f8eabe3783209ed63c33c29875a947ba669acabd11f35e71c. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/NL5UZ2502093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7037577bd02a5bc834fdb03f6fd20adc3c635c5d2840aeaa39ce8458528066. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/NL5UZ2502094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26217bf2a0ce939def56371cf869aa7252825a241b4334b6d5201d021f65774. 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/NL5UZ2502095.