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 0x4657188572159c2b3d6a210bc7b02eb1aeec1c660c690af05c0f3c488e15a914. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08f6ed62-9e6a-4665-b858-bef342fa8ce6.json and https://artists.proofprofile.net/proofs/artist/08f6ed62-9e6a-4665-b858-bef342fa8ce6.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 0xeda73b79f76284958652eb5f9dfb0fe7a64942c2ad19fce8f1d4cb390ce919cc. 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/GBBBA0843210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bae80c8a07ea28022d98f0ca865dcf4b3e7b1b73fdb3723928b7bc7199be227. 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/GBBBA0843220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a12c0684081f5605a76d99048d9fd192057b65aeb5e7d1ad9e6c498290d5948. 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/GBBBA0843230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2becd0b605b4900001c32b4c9b3893f4e2f691320a86795e52d66f41772ace48. 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/GBBBA0843240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9eb1b9f95dbbdb6dcca3fe2234c52f1bd9978ac1aa2d47083c6bb9bd011834a. 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/GBBBA0843250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ffee59ec9908c2b525de4e996a7c82fae729511d4ae690f93af1af5219eb1c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBBBA0843260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e06b56b1b1656c0eb591479601d1384e718e1a522f69f6733f6379e8f42490f. 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/GBBBA0843270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb6a25a2514387b259f1b63c2701b11b7a4030388012ce6dc6d54c9cf38fcf6. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/GBBBA0843280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0f9b857b8967edeed5fa196bc8b22b8f5d8194017048052aeb7df49005b98a. 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/GBBBA0843290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d22e11418233fccf85ee1270058efc9dcbeda917dcdc349dafcd307ae1a4d1. 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/GBBBA0843300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8344298da39d1ac5df19c3493097f31d01a770b104ffa791004c847aab5979. 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/GBBBA0843310.
When You're Smiling (The Whole World Smiles With You)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a0186dd7997d0996733040bad64b1a38abfa73ecc432a244e2e029c9007bda. 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/GBBBA0843320.
Pack Up Your Troubles In Your Old Kit Bag And Smile, Smile, Smile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244b375957dfbc6a4a22777a19bb489d4bbd635c02165127d90b786dc7730170. 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/GBBBA0843330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb30ce8f4f4c967f9249203fe2c4cc8eefd172d917309c3e5c2b7ba02ff28f8. 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/GBBBA0843340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3759700735236ae3d5a1190a9e5bc7d478f5fa8eb328980efb12b25a089cb93e. 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/GBBBA0843350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0aa5e41ce17f65a9c46cc77d2ad37c0974280fde31eb95000b6de8fa4374169. 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/GBBBA0843360.
When The Going Gets Tough The Tough Get Going
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065025bb67fa961b62848278400e54e8aefb2eeec5e6a1bd8707632482197c56. 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/GBBBA0843370.