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 0x3645d6aa3cdc1f7ddb2b845fa67d22d3201a1cc58369c0c37f894671aeb46c70. 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/f05006c5-1d7d-415d-957e-36b8dad85e17.json and https://artists.proofprofile.net/proofs/artist/f05006c5-1d7d-415d-957e-36b8dad85e17.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 0x5ecf6a4b42e57767c1dec8d477a532c250fbbd7e5c2587a5f0c922586812decd. 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/ITS252300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4827ff2595a6acfff1e72be2aaaabb29e4633344ad6bf86ef1021858c13c00d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ITS252300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fa48772f31187c69901aa58401ad0327c2adb8c3c29b266f3e825e78aceead. 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/QM42K2323333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36adf0b527f67e97e23962de8983b3dc7c6649bbabf37b87c11b29a99eeafac. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/QZMHP2325706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc982a7adb4498b4a183368e724ec3874f2cb0ac5c33867a8b85e5b9e70341518. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMHP2388086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070bf618df5f796565802038ea46232975d0aa6f1aaf9fb9cfee95915bb93b8f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM42K2367625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab16bcee03033a09b3b7eda91e4600eadb9347c5bb90f909368deff0bd205b5. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/DEH742401816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb52404a96c292140612c74fedd4cb9d4fcdfdd517d2060ae36b64bfe36d2537. 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/GBKQU2483091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c3aaef4ef6f03e63881358c7cbeb09ad9054d7d670c4bd9dc44ac640f9acf1. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/GBKQU2483092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cdaaadfd9038245d4d5aee974cff0e2984ce2d03e44184f8964e15dbdc4acf. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/GBKQU2483093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5792d6622efded00ef016c2ac8e519f966577645ca1b5fbf1d5da5598ec2591f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEH742433667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf305ac2e6fdb70fc2820ecd5cb84e7551f84352372fa1582ce50642bf2c1ebc7. 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/DEH742433668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d168951fba0b388a6f8d52e7466c417a7141668a1bd6e032576ef1fa5c86ccf. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEH742433669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bac040fb792326556e6597ca0974924f642f5f185796202e062a73657644bfc. 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/DEH742433670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6b274314b59912f602340fc0db3a4b4f3c18e286c4767238e8370ab12c92df. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DEH742433671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5e66f2ae2c1e1a6e474b16ae8abc9f662a59fa3a81762203420e093e99aae4. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/DEPI82416676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bb873b470b50ac06075048b08e2856d9c0f3daaf80ef05e681168d57c2d305. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CA5KR2457916.