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 0x459b9ea542837d1eedd6a1b6a00235f1796da3ad98a790ac1abe1abd333b2321. 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/a83930f2-a732-438e-8a23-d88f8c178da0.json and https://artists.proofprofile.net/proofs/artist/a83930f2-a732-438e-8a23-d88f8c178da0.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 0x08e25389fcf7dff64cd02f86d5f4a5f3bab5375ccdf055d3649bc5318ffcf271. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFR2490342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95feb40f78ce3155f8a0756d5535c5487ec4ad0b18e0248a93bb48e38d1371e9. 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/QZZ7W2475102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689f04d1e135a435a4561ac070a19ece993bf986eef5aaa61441901d88492d78. 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/QZWFG2354642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a3fde5c3e4835c3231184e29f5e60772957cdd04d6714cc28019e7d194798b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZWFG2354643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30ebd90300788a8c2b138043dc2fc159f19582f1e5635a764d914eca7fc464d. 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/QZES82461203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97bc44180ea27985d2dd17b81bb04a73ff97d976dd309c4d69a9d4a109e5a9a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES82461204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e33d21e5b98ea1913560919753bdc9e31b547f45263db89b84cfbb0ed18908. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZES82461205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bea9140dd824def0cabe24d101b96027ef9f0752b55dea285ff246232734145. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZES82461206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d87ee17a9e2b169e2f03fef7657328d5f1fcb450479c922e40273c2b5c5bf8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZK6M2350250.
I Dont Wanna Grow Up - Island Mombah Chill
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29aeb8b9848def56e1e5399864b3427b6ce4575fa0acb111fbe7bcb09a0a4cb9. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZK6M2350251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589f1c656b3d189db1289ec55ce316c31542e8d60cd6ba3073ccf52cdd31aaa1. 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/QZFYY2363214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50486360d0c341579bc8db57f3dfacaf936883454d1f2426f65b537dbc6fb902. 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/QZTBA2406282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e38406ad5ee3067c75be03af77fc82317e5b6f8dc322a2a22ea19b1ca493bd. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZWFT2481259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4c9dbe39ab265b7376c5153ec9a412c12b95afd56450aacc23fc81206ab18b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZPLS2590314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fbcf814486da902438b93863e1f396993bb4e2850c2b5c50b7e2ee6f892f32. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZPLS2590315.