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 0x2aaea08122ee41ea8c9054bc77eff8e796d78f0541ed757b52787841631debe4. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f134e75-4963-48db-bb66-ddb460123d13.json and https://artists.proofprofile.net/proofs/artist/3f134e75-4963-48db-bb66-ddb460123d13.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 0xd0861459161a0717d8321865850f6bdb8b2d1ed2889507614f3f69a6dd07b752. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ZAC012500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3f3bb857281b109deb9a37b6537fadea8066b4d8141b15551566c442f1724c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/ZAC012500778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7e6c22d10aa5b4340e56581bc33f67f2527c09b3bcb21421811a480fe086a8. 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/ZAC012500779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f75a18566045ca8cf5f4f4ab715d088f299e0b64bd62f13e796fbfcc6821a9e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ZAC012500780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bc272e8b5e1e846498044a89a74be283d5465e7ae9f5a8804cadfc636679f5. 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/ZAC012500781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6311aef5369414b5981a1de0b66c389c7931a454bfade2c625d72f1628ef832. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ZAC012500782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6d6ec0ee0de5e0e895bb31ea31a39ce26aa04433f0c7c53354159355d25268. 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/ZAC012500783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419556518365d4ef41912ea7c59c9e3910cbae9963b34844e4edbc65861eed66. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ZAEPW2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fde7e0ff08d7aaaba25eff1ff1cd27a3d0522ec2b555b2cf3880c9dafd85c8. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ZAEPW2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0008f83dff4c01bdbe1d4c704973cb86e6d112f865752e5c1572eab8246519f9. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZYFZ2447370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cb436b66f94044eda636974745733a9d9e219467d6c63e8875546f2b84421e. 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/ZAC012500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006b571d51af48a27ea80f07f95aab23482925bf935aca13737a977f2113b1e5. 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/ZAC012500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b923249d726c1c28fd1bff30dfe2fcb70f3d1f2234f555f8832edac3cd1cd7. 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/ZAC012500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd035b55c0df5725e904a83576ac2da58a3e808ac60c0b63cc2ab5d8b16e91d. 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/ZAC012500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32f0b4c01a6c38ed8e8976e2276bba6730fd4143b090ead862c06f1814ca035. 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/ZAC012500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21deb785c18c3cea2ca2aeceebd8fc2376fef990d8f18f116f80c5ba924cd09. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ZAC012500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d53118a22e94bcc5ed715cbf9602a539280264f8bf29c3e87a1f4346c06afc1. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/ZAC012401348.