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 0x01e1012f393898b7354326470552d7a044b72f84e226658bf2aa838ba2866fb7. 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/c08900d4-c3f1-4d90-a621-9f2068c0e9a0.json and https://artists.proofprofile.net/proofs/artist/c08900d4-c3f1-4d90-a621-9f2068c0e9a0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Abed Nego - Reggae Classics en Español, Vol. 1
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 0xf6b26d7b56f6dc37ee7937952aaba9f53b257093f032cb0560836b60be3a07e5. 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/ARA771700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf2bee02972ba59f15ecef69177fe163bb7c89eb200d511ee232750c3f7e316. 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/ARA771700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0170e973e10b866bc68825b034750f90c65abbfd15efd295c6e1fe890f57fd03. 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/ARA771700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119c3d142c7d3db20c1c1d00613266881165e3ba4d52df9867122a7f3e6f41f5. 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/ARA771700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755e8777d94275e1c670e0e89e02bfa084580964c0099ce0408c51e9029bb8ab. 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/ARA771700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bafb68e46571a30302378009e852dc509be7a82797067011f3086daefb9d99c. 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/ARA771700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b2af51ebf01204a30f1b7f76536e5af312d6a21430210bcf5ca66b4e6ee720. 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/ARA771700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e50ecdd9877d342ebc0964074e828d43de900256644a1438a4c6f49239c0290. 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/ARA771700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7943c824cceed277797e2da59e819dacb885534ed70b40b206302f3e5ed102c. 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/ARA771700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e43af5c6bab903fcdc0426884513655de16219e47cca6fc8b708c51c277b07. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/ARA770400501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5882c94cd0ec57d9a218140dd99d71a262ab7991fd0cb925fbf3102dee77be5. 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/ARA770400509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e89811a1a17f6ef4375d3f447cf48eaa371f6ffc4e15f7bb8363d5bb6f6242. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/ARA771200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42c9cdde0bef12004cc0b31eaae6be16c35decbbd9f65a861b8090b6296014d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/ARA771200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffdf7dee7a27d5a42c47e05d4b977d744b7e76f00ffc66e23ad3c55b912bf6a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QM4TW1641760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060918942143d2e190cea285801dc69c37b0c078b9008a99b2a9c50bf7f7afda. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ARIXB2206714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0974bfebcf484efa12b1cb68895bba60c589077a4ad5ad8b4fe2031f6c33f6e8. 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/CLEE21102680.
Hemp! A Reggae Tribute to The Beatles, Vol. II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42887cadf44bf21e929e03ae8a5f137f246d5374f7bdeb3958b13adaed772b01. 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/AR1K21300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624bf60baa07bd830ca8bd7dac39b98ab236d08e119182cb73a5173656a6023a. 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/QMDA61806872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff22febea132b85f850651ffd9b61c8ce21457aa5522542e097d738cf79e03a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/UKHPJ1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d840c6489ba5f3e6b65a158345392825fde0118f2d7eafe864c79ea1a0eebe. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QM6N21599955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b03ef648e9503278949dedad3745d535bc8839b0ef5fa676cb5122a2673c2ed. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QMDA61807200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab246bdaab1c1817c00f341fdef225e8c30a47a50faa063dc683a9eaee37d41. 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/ARHXW2204397.