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 0x0a5d7524a137451086f1ba17faff3e22fa2076702e014e1d63de783fb396daf3. 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/8e12cdc8-2b78-47a0-8806-6163d56cdfaa.json and https://artists.proofprofile.net/proofs/artist/8e12cdc8-2b78-47a0-8806-6163d56cdfaa.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 0x86931b9dfadcb8f3de04dd3946a829d6288502914acbf1fcd7c6649dd4a2b42c. 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/BC32K2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f47ea4a5f6ee41c3aff4633e4b4a59221a521eed2d12445bdc338579b300a2. 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/BC32K2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78113106080aedf1d5e1cb86a4901b27250a866c96e50fa70cc4eee068149a23. 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/BC32K2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732e9aa57c58785062889bccdfe25f1d8012bdb1ae17ac2d970d508139f66679. 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/BC32K2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c2d20394f30aa14069c4fc034fe823c747aab0f9dbd5f639c1073cd3d06333. 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/BC32K2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86931b9dfadcb8f3de04dd3946a829d6288502914acbf1fcd7c6649dd4a2b42c. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:38:30Z), 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/BC32K2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3cdfd8193cb6b256f0bbdabe464a2b0f5ea117fefefe4b36b60f854f4b6dc3. 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/BC32K2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74aead1537304c40aad86ef76965eb29e8bdeb005888e2585f2f10820dba9c37. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BC32K2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a88c3f64783c852bc58492387a6ecb53e5292815059b714233bd9352c829cc. 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/BCJRA2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0953368597c5c9c5c2870e76c3aa781da9b1aabb4e5e53e05ca48f18ce69f151. 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/BCJRA2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62929ac3b28a57db08656835f1f1b29a2ae8b6373cb115efa2f97eb1086b757c. 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/BCM9A2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b16b33dc34354dc1622b6361fdf51320499387cc020c007f3ab84027d2639ae. 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/BCM9A2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ef4c56366bff56e88d14c2673753a59eeeb71e81594b0be182d69671473615. 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/BK7652400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc0821369e812c9e3ddfee727aa5977fe21b4596000e1078381759d77efa1d8. 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/BCNHE2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc13025b9d5d6ae5465f7c91c6126bc556e3ae978ab9cf58ced31609bcc02e9. 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/QZNJW2126124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ce44af63b34487183e18c8e31723c9e99f58daff1bc5d5186fc9826cedaf52. 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/BCM9A2300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3cdfd8193cb6b256f0bbdabe464a2b0f5ea117fefefe4b36b60f854f4b6dc3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BC32K2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea76a8de820599a7e886f2d87657fbbe74839526d6880ee4f531ad4d593b332. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BC32K2200013.