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
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 a Boire 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
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 956857 (2026-07-06T01:26:17Z), 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 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/TCAGZ2320331.
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 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 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/TCAGZ2320444.
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 0xe146a2f719c82c5e6f4f23900fa0733e57c81322020b3b1aa7fb486f950ea4ff. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/TCAGZ2320478.
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 958544 (2026-07-18T12:14:37Z), 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/TCAHY2422650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408809728dd3b129b96840ea0f0855badef561052cbe6773aed9b0b9b6964b22. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAIK2486728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7d0b3f0d54d78260a066fd029ae7f0af99cde22df8b2f70b43cd21afbad9da. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAIK2486745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559a28b32defabf68eb6c26972a9db19c65921d89b2fc059fed748683a91811e. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/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 958508 (2026-07-18T06:27:01Z), 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 956713 (2026-07-04T23:03:25Z), 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 956738 (2026-07-05T04:47:21Z), 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/TCAIL2486773.
Di Provenza Il Mar (Il Suol from La Traviata)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a7902d381bc391a385726a8908233a79d441aa75d93391a725d0f3e7c1909d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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 956826 (2026-07-05T19:27:56Z), 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/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.