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 0x680239f3a6337be8b6687f88594c9c1a3251b6693a934258d283c6f8f5abd21b. 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/163d083d-c2f7-425d-a4aa-287ae5bf621b.json and https://artists.proofprofile.net/proofs/artist/163d083d-c2f7-425d-a4aa-287ae5bf621b.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 0x0975389f809feeafb94f51bdcfcbdb7ea8d3419fb82002521b4c6d3dace3a97a. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:38Z), 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/FR9W12252163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf7a0573f52be6bbe5c5bab6f1859188a4d5fd0d7d7b2389f9057b0c579f098. 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/FR9W12252166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47096c1f2a49ed000adacc903a782225f08f35162ec10edb4cf45602fff90c8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:41:17Z), 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/FR9W12252168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ae8d4e965f2c8f8c9768ae71f76677fd28b5cb99cea9095cd4bfc080acce34. 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/DEHC81300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2711b36d21e51596d87fb7d0f27f09cf9c35eeb1e440937a62f0f58b61c2f7c. 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/QM4TW1788329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b854c39187f5c55d77b2189bcc021ce6ca7a2f6cb16aea862a16d61f678059. 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/QM4TW1788330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa950c359ff6642135342d3a1edd598ea9d6e38f752ea017e323f01e2cda850cd. 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/QM4TW1788331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c31333be93c0da4fc1189f15b96e5fa0bac5e3ae4da10f0f96a2f6f8146faa2. 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/QM4TW1788332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7590aefca9d1601770dfdf8407bc0dfc64293cbd9d0ac33424dbc150d58bce4c. 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/QM4TW1788334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8745dc08da33c806d01c7654c7f7a5c2a79ec93cf6f0a52c243be79021f56c0. 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/QM4TW1788335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe85e66ea5303cd2fae7583bd669a2df0ae470f5b41bcc5bb03565c7d89c7f04. 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/QM4TW1788336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf281171200f68a4960e7fe325c984e0a9474bfb93f9283f7dd300007cac884a9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM4TW1788337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c0d3463cc7eb31b7796d10c3f112d2540767e84ba814f8ab13dc3d14785f8e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:03:18Z), 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/QM4TW1788338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525c6ef4ffa2a787d121a6422d9197a607be8dd6c770446ebccfc87c5635d8d2. 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/QM4TW1788339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e48b115ec2e322abf6d0f4665731bc9d2e2101cfb23cdde70aeb4478c8b1e6. 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/QM4TW1788341.