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 0xdca2adc0cd636d2d74e36d3c2e02c9750acc0cc1bc08192fca6d2f8ca110291c. 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/55f79aae-7215-4fa1-adab-afc4ab968558.json and https://artists.proofprofile.net/proofs/artist/55f79aae-7215-4fa1-adab-afc4ab968558.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 0x84efe67f70d0ee861d7bf0390dbd8b79846548dfdd4c282882cd008927a2d859. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/BRMCA7700228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda60fae96bb3db94abe74fd2e13fa172cf2164cccd04d5b51a80a07f381f4c7. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/BRMCA7700227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850fc4bd0a95c9253bba2d6c3ce4cadc245293cf078aa88327e59bfed7c4845e. 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/BR03D2101793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377372bdb4749b2ee281db34cde1b35e4eeb3133fba13e0afe9839bd7ed1334c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/BR03D2101795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8539dd0d2ae6c1c8743a0a09f0c0bab3ebc5148f4e145869278f4b102dbebc. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/BR03D2101796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28643f356d340974982bd8d01aecebdddc49fff3d403d20ea0e07e0c55442d5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BR03D2101799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd061bb350a77fba2ef8f9d22b1943e866ed0530c1b59b7257ddb6ca71fe01abd. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/BRPRX0001003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f23bac37568fa4623d3fa5449933d565da15abd5936cf72df13a95d55bfa30. 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/BRPRX0001005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152c76888efe3b80e28616b3d33643cbb169b5b24d271d472908b262e2c5109d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BRPRX0001007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbeeac55da3d4c294094a14c3afb081e33f431202bca80faeea3129a254f9b0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BRPRX0001006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71bb06a27532bdaf3c8f449f6777dc0ea0fda12255fd15df52e7f641b4361a5. 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/BRPRX0001011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c58d494fbbfb97b4966a33068ee47f3a8d1a97791d1c226a2594d43d73174bb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRPRX0001012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5127fc5aa9534ef4336a75364eb511ee513d260d64c0d703290a2bfc730459d4. 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/BRWMB0101501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a79038e587dc6437380341d80f72b79c22ba821d8a852731c18cc2bc669268. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/BRWMB0101500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef23e9b8dfd863045368de999ea8bd8622d3522da9849c1ad8ef8e7faf97621. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/BRWMB0101496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d40cd329919587dff11279a93aa75b11d83a180fbd7eeecc3f29df68b483cb. 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/BRWMB0101498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314816ad142e21b481630b3f260b9e1a872dd261fd0ebb00672089bb79dadb08. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BRWMB0101493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2f86f788e5d2056736d0ebb87b2403d7144a71ec4189fe474b6499342f18c1. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/BRWMB9901568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a8f1d9906785c34cab47db0d357d7fd6e90627d24dff3204f2ac271c9d0c9f. 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/BRWMB0101495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c49ee948672b00309a331e0b198d390e748cfcf07eab1564e74d15e1e30149e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BRWMB0101502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f91f969d65f97c453c4f19d12a98fbd61d76f105d9f6a892836f084d190cd2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BXOAV2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72aea015a3956cf8e1fad3c5e9d188e2e34708cbb37219ccd61f072353b03c3. 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/BRWMB0101497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314816ad142e21b481630b3f260b9e1a872dd261fd0ebb00672089bb79dadb08. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/BRWMB0101493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d32270f12611a6972b07615e57fef3223a17165788413151e0d24d02857a168. 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/BRESM0600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc428a3e9fbb9d5e13b50a30891016be25d4f091eb82fa0ba1f3d398ec338703a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NL3M12416254.