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 0x1b0c1ffb83cd04b3328b868f9b9d2697c93d8ddf537594fdc0536cb276b36214. 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/9f03656d-1863-451d-9c3a-172862d47fe4.json and https://artists.proofprofile.net/proofs/artist/9f03656d-1863-451d-9c3a-172862d47fe4.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 0xac7deeab8515c5a03b46915348be7a8a0731a3752e96956f435f88a21e9adc80. 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/GBCVZ1600083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec66b7c85de00070dcc90433185018eab75bda8fdc0734691365f11e1546d18. 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/GBCVZ1600084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bce9c967c13fbf7556a0e233f19923a9f437e232c4ac0161242fd7987d15c4. 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/GBCVZ1600085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2fe981ed874c3279c9b71585fdd3630fe251993b14ac159dd7e41a912da1bc. 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/GBCVZ1600086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020cfe49bc52999253652712b2d32c348561a382d1dd6f55889fc44c2f657a04. 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/GBCVZ1600087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6152ccb192094bd65c976490af3547765745f6b3405e744366e58a8a5d6ed14. 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/GBCVZ1600088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17401e3ab3de8dfead931d745d0ba0b165a6b91fa33bb7af2ca6bde65bc9b659. 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/GBCVZ1600090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75094a304e68fc8c30a086ac1eca3aeacd1508e0decff1c9a5746756e550873. 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/GBCVZ1600091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd63d47d81e2bd33d0f95e834742182b0166f985882ef95ea8ccd0357ee44a7. 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/GBCVZ1600092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5212395678aacb443085226898a62b89a3541a22802f1a0432e63a5de4f6e2c4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBCVZ1600093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9a2cbaec9da003f89b23be895c737ef6bd8fb6753ff6678f447d51b72d1119. 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/GBCVZ1600094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf341a70c4280a2b8d868c11e3ce3e7a4fb3d49bbf086fbe85be3bdb47e735559. 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/GBCVZ1700152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b923a1e6191be8bbcfe8d93e8a4cb988195041c063d4d552630739e1ca8d446. 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/US3R22122801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f20773b80a96ed40993ee774ea2615475bce78d6b2f33e8ac0826a82ea3330c. 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/US3R22122803.
Rizoom (A Score for Contemporary Dance at the Opera)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27407f57d8eabac321fe1182f5d0a2912a34cc4d069f6cc8ddd0c18a1348109. 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/TCAID2489723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8c8f0d440195e075463747ca212d6fa082f55aeb52b6387a3620bf806b66b8. 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/GBBRP2200768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cb9bca70103cd0b341570614bf72235537882c47d564d1d32cdb3e6f085be7. 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/GBBRP2200769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf874812a1a6cdbb89bb2ae2a804e8d8e3a7caa208ef9c933e0fcf322287ede18. 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/GBBRP2200771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86530ae11c3ab552746aa2d63a17d258f28508546f44855f27d56fc2698d8adf. 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/GBBRP2200777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc363e306f46263e9ee44b7eb211fbb7c68a5056940c8962237d5dd42937ce43. 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/GBBRP2200774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca4afdcb3180077d86495e93680098bafd422a571e452cbeabb2612111166ab. 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/GBBRP2200778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aefe9faa1386c84df00588a3e55254d23da854aa0ae6a59765563a4d82b06a. 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/GBBRP2200772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535735c862f1893971963a877eaa7a5f8eed3eeb1d4716219f0084157e671687. 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/GBBRP2200773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2fe9527f04068f2fd7d99608a0ad3adf1608a3f17b8c94cf5899c96d109425. 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/GBBRP2200776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabb4dafc30e47f0cbbff9d1248bd49616cc65f1b7b92c7e7875e2fd5bf54a97. 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/GBBRP2200775.