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 0x3f56449842866f0686ff207164752ec2def635806c41467434089a545aeee175. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab1f01d2-3c8f-456c-b0fc-a73877e2d57e.json and https://artists.proofprofile.net/proofs/artist/ab1f01d2-3c8f-456c-b0fc-a73877e2d57e.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 0x3b7ef6492aa21b6fe27fea875fd428af3933da05df92dbd1b050fb59ca3143ae. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SE6XX2336823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0e949b439429c5724c90fdae2adde73867d1f52e7a1012628ef581dc660493. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6HN2495340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0c94e9c7d872801b1d48dabd375749d5f48565b26c07b66a6135b43057382e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SE5BU2457616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9827473b6986418345b3e290be078effda4b54393e7079b8eaa6bb4a60830834. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/SE6SA2396814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02767232d89674c01ad021ea95dc967f2b03bb1d10046f783fefe851d94d2746. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE6XY2366724.
where did you go, and why are we drifting away
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ed05b67c20a4d3e7ecc564c4af825a6ef439cc5d1c4b01c461c591eae1186c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SE6SA2345466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d55a713bbbf8a90c96bfeec66b1c11bc849db7413e439dcaf22e5c53e045f4. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SE6TI2307671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be2825828e025de65c38644e4e12c8ac7965c951cfd2e8723401e7bd9dec236. 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/SE6XX2531742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5034bbf10f7b208abc506c7005914d86a08d1c3c5460c23a8eea8bb6ef9717ca. 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/SE5BU2557026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdc2b3142695e190b6948b3395aeae686242fdf229281842ac27da398478e70. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6SA2435487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35749407b4321e06d83d599167f34d64505ce41405e6271e204b7501b4277d0a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SE6QE2484480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf201511cc2f3d89a997dfea3dc687463ff9b4bd4e3dc32dfe26a707c724738a7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6XY2579640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b62a9e7b3b730de729d271f9626689edf7d6fecc30b70393f1a9fc428cdba2e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/SE6XY2510711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3949b0ce8532f019a9997fc946108d552af9af36ef16dc62ce203979266d22. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SE6SA2469593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf475f61fa3718be45bb98443689a0a62ddd89238c1f20cda45aa6fe656049676. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SE6I32424201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1c9d656aade11568ca05ffac3e3d50d310686f86c13d1d6e7fcdc7a9591c1c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SE5BU2417201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef55986c31d52dfaa1f4124e62f2d74e4813f98fe6c0cf9de328540e72a296be. 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/SE6SA2377282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a48ad5b8eb2bada40aa10ad3d1be573a5315e9bca253808a4864c7af2b9d954. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/SE6XY2309249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc29db3a61e70a226285e00b48ed4d2208d6aff1db43983475c1f15ba4c0f56. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SE6TI2349020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f78c24f9676525ac90db5af881750112886b891d83595ddee629d9d1172f399. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6SA2377809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5dc367d18cbdc10605a8115b102aaab5239a9ea3c169a190035505ab4b6c7a. 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/SE6XW2367012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7882ec477a3a5f470bd41460674ecd0de821b2af690f00edeb2c8ae14a77e023. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SE5752386548.