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 0xbc0bdd3427138aae36558b4b31cefab03bffe38be8853d158bf8009b430330d2. 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/6f072a3f-e4c7-407a-9e4e-9ac3d710608f.json and https://artists.proofprofile.net/proofs/artist/6f072a3f-e4c7-407a-9e4e-9ac3d710608f.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 0x25e901c92d3f3df88cf430fd23d973f39bf6097cde29a11b7e4dcef993447c92. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USA560576488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ed6df32d73a56e93ba422cdfe7c657aaaf54239c72690db90f3d3f8848bb0c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USA560576489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a93826ceac9ebc7b02d478d97ac4dc34921af2152c2ad6f09554831001f1f67. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USA560576491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd99b34fc04334f3afeaf1e5742fdb871414384491271877f036a17b174d40cc. 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/USA560576478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6165f61fbfb5fff1d20fa1f0f59a477d33bd2172b1cdad1b2220ee542cbe42. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USA560576493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbe7cc4153cd6f8d009ccd54782d399ccea959bee8cf17087f50cc64ae838b8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USA560576494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa465e46fe468d641505d9e9f2df4dfc27c441fe41206a93d96f6cc3fc752347. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:15:09Z), 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/USA560576480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44400146ff8c6f26c8ada8ba4f9fe4dde0e4b9f0e5e02811a56fea44c0001e78. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USA560576495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcf701c3ac88c0411e164b4decf4fc45dc8fff69c59d74062a523870aa13f0c. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USA560576496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250e1a7e8ce3f8657c42f9da366e86b186514d9203cbaafd9150a202be283133. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USA560576481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43baba64b2cca62836b75e00e19b5f1906905694fa327e90e61a1ddae2c1b61. 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/USA560576482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb7ec9bee6b509324124a329c6a14bd6dc04408e2c065072f4a5c9366047b71. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA560576497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9490deabdab0860a62e61ad9cc5b4294a99f78d3955fab1a78a6f259d94ff3. 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/USA560576483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccac4f3b130aeb82d1e39df88cc3f877be470a7525455c39d6bd91ce2eb8e6d2. 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/USA560576498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb293b9a43fdf58057c9d6c6b87b7096e7f4971ba13c171bf369a54e396ae2d4. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USA560576484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ac90cd25d3c9542a00786731a7b872186e6df0a4a74b170ef3ad8a66a8dd5c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USA560576499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bba4c42643b8df085d8778372704b0d73a7349d86db0f72d36859f126c57e4. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:34Z), 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/USA560576485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc527e1784cfd64eebf7fbd91d6f9ecfef36e7cb32d63b599f866fc6c5aaed1. 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/USA560576500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331e33dc61ff02c7c54540ea3dd15996e0089c16b99c3964544c0c77f2b0f11c. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/USA560576501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1809f68a6fb350c1513e8caf81183c483e40f941908c3278019f61c1cb29fa1. 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/USA560576486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b60a5c64744c9bde195923c7edf81b2431bacdcfce41fc958adfc6cd1924db0. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/USA560576487.