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 0x62da9e42757a0a9945c91f1cc22251889ef75d28710aed930ba8dfb36559d972. 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/a2433912-d1f7-4228-b3b1-94217a92426d.json and https://artists.proofprofile.net/proofs/artist/a2433912-d1f7-4228-b3b1-94217a92426d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
French Nursery Rhymes: Traditional French Children's Songs
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 0x4b21f5b465c4cfb074276571c7d1bc0776fadec1e5152d5793b90f4e81f5f32e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:55:36Z), 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/US3DF1538925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7795a226064b3a59ae68d449df710574fbbe270710bc2b14256a156239364f. 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/US3DF1538926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5721fc138b90dbc8c2c207d8d89f409b1587f7c7f9b27f176f482b3b3811a3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US3DF1538929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f0d3de2175b46f11044e5cafe6fe19b47bbefc3464a26e7a51d7bbf3d44c69. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US3DF1538931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243cf4de80d54f435976d3df679205e792463ab8237fe90682e8db2a33842d23. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:02:18Z), 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/US3DF1538932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730aecc45fb6ef8aee50afce5463dd60e1ecf68c062ba1f26aa509266523132c. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/US3DF1538933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2337c74cffc243dde50a575f915ba46d10a9de345bc16decbba1afea32b5b84e. 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/US3DF1538934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87c6afc73849bd25114431ea816f050df74cc5ff14c8400d9bed1a0b4868d30. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:43:19Z), 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/US3DF1538936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e3d0ca693a27b1ae2292d1684d731e26709153d02317099e5f4f66432953c6. 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/US3DF1538937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9407166ddfd46b49aa0a038763dc929e89bf4c63e58e24ef27f4ac2bd54b847. 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/US3DF1538938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0578a76d7511abdccd6d27488c839ccca3ea3e00be087d1c063ed1f7cb79467e. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/US3DF1538939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4136d2d9c04640d39a1cf20c2b8b3661318f728dfd6ed7246e7a399b4e9d39d7. 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/US3DF1538940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27752ad7b3a91f8a80ad704a63cd1744e3f10a7432513b299d52c59c36e2cf5c. 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/US3DF1538941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00d9b14bce250e195464d988d63b40ae481130622c2c602a356de266e202964. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/US3DF1538942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92561d2b47a5a26f65125cc3cc0ee5fa9ae1bbc495da29f569da94f6c2f38f61. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US3DF1538943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552ad388b9ce097fdc98c4a49fc72af837d1968cca14ef9451ba49878ea44bdd. 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/US3DF1538944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1088cac549829366b3a9212a5c83f95b401a34a0cedc189b7a513548384cd1. 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/US3DF1538945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b661cc563c19eba48b0cc13445280b7c55e86b3bde31f462fc2a310efdcbd5. 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/US3DF1538946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ac580e7169b503133b325d9f1219a9ece2ca84956262d963ed889a9ff42a52. 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/US3DF1538947.
Les super-pouvoirs pourris - Version Orchestre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe7f2d8813546a8c061d53259042595b8b452bb435e53a219014e6a1204640b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DETL61401274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028e8122fcb4da085f69041772f6c497e7af9bfe2353a57264735940bd81cf38. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DETL61401269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64c296142c0e4489a53199e79650582ca11289701200dd4c6769a039c15bf6d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DETL61401273.
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