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 0xa297e7d2c6522f98dd30a2572d3bdece5a91a19712584ebae64200771abc969c. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/070aaaff-075a-4d06-aa7c-68a5d027d887.json and https://artists.proofprofile.net/proofs/artist/070aaaff-075a-4d06-aa7c-68a5d027d887.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chanson Epique from DonQuichotte a Dulcinee
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 0xc73b9944631ecde4a38a35abcc3d884f77e226e0db12da955b299a8766fc380e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/TCAGZ2320032.
Chanson a Boire from DonQuichotte a Dulcinee
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f17794a5e6d32c99e05fe6bbe866e6d31dd544c704d2aef0e9d9ff74d03aa94. 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/TCAGZ2320286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb6c1c9dc4435286defeea3621f398208b190980bbc198910cfafaf4967bcc0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAGZ2320301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1e3cc5f0ee9c77f4580094914f2c16a0ff1a2110623d0ac59684d727c518eb. 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/TCAGZ2320331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7b2b518e4652605fddb15511b3f07839f4dc63bab9cde99027544e8039d7da. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/TCAGZ2320346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115b349d963a26a5fe7e2bd6187cb861e39fa56a6d6d32171597ddb905f6a8d4. 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/TCAGZ2320358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ef00bf58a1a0fc218c6b9fb4de8eb38d948e3803124c070f09a423fba45a40. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAGZ2320371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8baf5dc42e61b3697a248e31e9a56f034d72a6bd55fceca33c6501246c0e11. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/TCAGZ2320381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58770ba7a594af6c48791cc203b1865eefd71ab872e219cc42180b873b7acfaf. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCAGZ2320390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c54d602580969e8ad39937ab6e5ecd7138010367d8180da219695b0aa52482. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/TCAGZ2320426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee57abf0d8693e64a065eb67405f5bd036e40d163440566c1a6b0f61c82a6a3b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGZ2320433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5135a5228fc462e1b1523a87f7258e2438053490d6fa2a7f17c1242b486f2fd0. 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/TCAGZ2320444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba2c61b6247799df78e6da10e85c1a3fddc98eded6eec3a3263c7b70f2ec979. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAGZ2320453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054ffbc79c4c39cc4bf93810721142c781c74f2f3db440147b22c9f8dc546e38. 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/TCAGZ2320461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9ecf883bc051d126308afef02838ef5c7a80ef30ddb5d973c891d8eabd5873. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/TCAGZ2320469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe146a2f719c82c5e6f4f23900fa0733e57c81322020b3b1aa7fb486f950ea4ff. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/TCAGZ2320478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dae0d4eda1c0e223cab7bbd6ae283c0bfe3b120b12f26b1e27fc95a46c57317. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAGZ2320486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf323e878366571ea66734ac398141c3d14355adefeab5e9bf5324c5dc9a54b21. 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/TCAHH2358635.
Or dove fuggo mai?Ah! per sempre io ti perdei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934361a99b24fdede89aee3824930fcde10cf48dfe34f8a6de7bad68e4d6a174. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAHH2370724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292cbaebd4546b109ecb1e2160339b65ac320237568683428001edeadade42a0. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAHY2422650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fa27a541cf3b5ef1aeec032b67a9f7437d5cfacd876cf3143bdb218236345b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAHY2424396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad666f8b20a8b92983e029ed90becbe191f7904a5ec35fe51e11c566fb44fc15. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCAHY2424418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408809728dd3b129b96840ea0f0855badef561052cbe6773aed9b0b9b6964b22. 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/TCAIK2486728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7d0b3f0d54d78260a066fd029ae7f0af99cde22df8b2f70b43cd21afbad9da. 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/TCAIK2486745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559a28b32defabf68eb6c26972a9db19c65921d89b2fc059fed748683a91811e. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAIK2486751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d96fa54b8d401dd611de30951f0a69df887dbff4425367ebdfd00df83cbeb7. 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/TCAIK2486754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd48a8607772c1b7d87e6c1978ae4144ec7f8b81e1545cb00d1537d83cfae62. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/TCAIK2486758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f74d4909aba70a2371116d59b52cbedf88d47ab274d6b797bec7eab4841136. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCAIK2486765.
I Have Trod the Upward and the Downward Slope
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e0e4ba6ee0ab9e2b596c62bdd5608e2b421e7a59146144f0048471702a22bc. 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/TCAIL2486773.
For Behold Darkness Shall Cover the Earth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e857ce92953ef975aaae3d5b14180121476b7c0d0bdd5c9b5ca0546bbceb1cb. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/TCAJM2510556.
Di Provenza Il Mar (Il Suol from La Traviata)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a7902d381bc391a385726a8908233a79d441aa75d93391a725d0f3e7c1909d. 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/TCAJM2510605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42872793800b309cffb7df5ec4ad2597e6ed0dbe3724872eb682b20c36276a6b. 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/TCAJM2510645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffa5bf721acfab36ae8de330fc2c352dd4e6ce12f507b0923961e2f4cbd7b2b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAJN2515372.