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 0xc8a835b4939471133ac612eb8a7c5249d154b6abe4271c5632fa6dd1db27b3fa. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16c83fc4-e6de-4d5d-b125-b4b0fb5c6d5e.json and https://artists.proofprofile.net/proofs/artist/16c83fc4-e6de-4d5d-b125-b4b0fb5c6d5e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c39fd369c8f8b794640c3f868d2cee5c275b5a5afd90715f066445adff50d4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR2X41932531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f45ef0b365193f7bf9810be398355e0943051bf7e36bb27f0f3cb4830c415f. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/FR2X41932532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29c0aebb7d47259670ca423424f16ad49d4fac57b88c42d633cff2c3c43f880. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/FR2X41932533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d20cabaa5d6531f39be7fc13eeb0adc71d3470e30b68935abfffef28397bfe8. 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/FR2X41932536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca30ab7945ad8b8b4d8a29a5f13885a25950a295fe981141182930ea09e8c102. 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/FR72X0300592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f08063acf5dcc0d904a778696100f27d7989373f039342ca507b34f25db3cb1. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/FRP8I1700870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d77d4baa3a267ea662298a7e0984774477790cbf6899b3cccf9966ce60e4ab6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:24:40Z), 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/FRP8I1700910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f7f11af7a907148af32b2fa783c397fd8f1ccd6b982ed3ed56c16941cee1d8. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/FRP8I1700920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585280892261caaab79c145394492be14927bc2034791ffe4a0d68fdb6d0a8ac. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FRP8I1700940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfde9bb2eccc565a17b2a45624568af75f198f580a90c4e95b5a212c0271f8de. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GBGYQ1300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263336fa453fe1e5670cfabcb7c5968998d4045802892181724f2745ec7daa02. 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/GBGYQ1300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845d2be34a4961290ede46391eb5d17b4b28ebd3f6f06e0c6d4814bcc45d9a94. 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/GBGYQ1300127.
Black Stamp - Jean Michel Rotin by Mike Clinton
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1035999e46a64a3ac1f4f2b2f1b437de771f60e512cc08573d9e421195dde8c6. 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/FR6V80619487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5205b6c58a6d0a7ded9e3df84148e435168dc232fb5bf3bc6a23d358b3f482cf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR1S90600201.
Smooth French Caribbean: Les plus belles balades créoles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd88a9d35cf538e69076c194066170c08a6c03e120c996f0df2f00b45dfd99fb. 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/GBGYQ9100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eb11f7ccb4fd7ffe92cea7c422a074283ae6822851d6c05ea0eb1741deea71. 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/FR6V80498947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88e3a48f35e8f084d19d2edf20e1e295347506aeb51454193f5a74fe76b5b73. 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/GBGYQ1300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7e28c4f1870d3a51f7bfdf5e348c1c24bd7057af332250d0ec6e205c467a36. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR2X41892068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8a28d9d9d2058f50ae23cb9ca5a8b3134e7cff8d5436aea769dd7d2a53441e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FR6V81742752.
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 0xd8f60e870a3de8d4783d1bc4736bf56c872c59d6b0979b56077bec4666caf01c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR6V81742758.