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 0xfbbe1646c2ab1c74c85674696b2eef77fbfd5c69c1c3cd153248855f6458fd47. 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/43f8dd86-d798-4489-b9b9-1785277c193d.json and https://artists.proofprofile.net/proofs/artist/43f8dd86-d798-4489-b9b9-1785277c193d.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 0x35073ccee401cd6e84cb27b2ffe2267b3d5bbf7ba502b132f7b9aa6299f970f4. 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/GBPVV2400477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec37203239788816720d892e75a498da5841568056b39c64761d15a07557341. 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/GBPVV2400476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73474d43cd78ae5790f52aebb28f1782d070b53f7d9f85fb523b7fee1db2ac71. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEY472377668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73474d43cd78ae5790f52aebb28f1782d070b53f7d9f85fb523b7fee1db2ac71. 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/DEY472377668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef69491cf16bc115e0efb1c9479bbc89c907b5645192431fe9c7523cd37ac954. 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/GBEXH2401866.
10 Years Love On The Rocks - Sky Is The Limit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7179b0cf092b52bb6bbed6c3f1ff56a39edb29f578a665161b790522511d33. 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/QM6N22492544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885ae02fa5de36a8711517bd00db40da3a3c450b2871b6680a06d2dda72049f8. 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/FR9W11607310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a67716a7d56d402de3d774d54060d1ca075e9cbc35e357c3da1c5da087100d. 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/GBUM72406630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec37203239788816720d892e75a498da5841568056b39c64761d15a07557341. 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/GBPVV2400476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35073ccee401cd6e84cb27b2ffe2267b3d5bbf7ba502b132f7b9aa6299f970f4. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/GBPVV2400477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a465d12a9866db1c877d4e53186cb888698e94f50ca6b6d8aba96fbf3a151e. 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/GBUM72407559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec37203239788816720d892e75a498da5841568056b39c64761d15a07557341. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/GBPVV2400476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35073ccee401cd6e84cb27b2ffe2267b3d5bbf7ba502b132f7b9aa6299f970f4. 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/GBPVV2400477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303bc1d2bf2d739aeea91f69f04b52bb56f6f93dfa3046e70578c9d0f5a005d7. 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/GBUM72407766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35073ccee401cd6e84cb27b2ffe2267b3d5bbf7ba502b132f7b9aa6299f970f4. 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/GBPVV2400477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf789f3441436d6e014729636e598cc7cf1225c07c9c8b1908f7ecda7b6fe0d61. 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/GBUM72407800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01203bce9bad5e8203aaa65fdd54d64801ebd7e74b36ef0dbfaf2adea9f11b89. 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/GBUM72406643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2693554057ad452d6ac8ba1437da234e1bf410514c35f8952aaf6a3132753fa. 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/GBUM72407560.