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 0x3372d5ba6f23e1521d4874502135973e8d0e02408d91a78b6a82d03611241a3f. 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/de3356f1-9506-49d2-beb5-f7b854db9236.json and https://artists.proofprofile.net/proofs/artist/de3356f1-9506-49d2-beb5-f7b854db9236.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 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 0xafca124c201a887dd609940d9d507babfd6c05947aa34b3089058124e6655215. 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/FR7O51600260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2e3e3d15a1017a65b2048ccd75f4a7eec5faaf8380b96ebde5bce652b330d4. 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/FR7O51600210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e72cfc30a83277d83bafa61732d01d85e8b5b7704213ea0d4b6f6c5cd9bcc34. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/FR7O51600220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc8eded9d092ed6993bd7148c0397f54a71a1932a86879cf41306e46851ca56. 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/FR7O51600240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d37872d13c2d54f337dc1210398137af7f2a4205e25d88488bdc9215e614f9. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/FR7O51700360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3676236f07f809576e0d1c1119cea6b5964dcbc173e908c58e21f33b168c81b5. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/FR7O51700380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1bb851daf8f8c0641267df49a0161016939d8284de53cdee634eaa5ebfc684. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FR7051700410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fc19314743ef3c91c2f6cc0b37a07c8f18f5f5967077018a269adc91d24b30. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FR7O52000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df244d7201ba42fb41a61f087027cb9b61f4ddf929534dea7a514ce14ae91f2. 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/FR7O52000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f4156defb3b984933b39d16f551cd4dc1087d3b19a9b87a8e8db9bb2223867. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FR7O52000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6186c7aa5f0129bae85024c4c1b1cfbaf4674f7832977bc85de5c71e45c0b55. 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/FR7O52000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4505459623f2355db536e96998a1bd2b568d3841f5706da33fc162ce1434bdc0. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/FR7O52100290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eb5d05a32b5dbc1fa133860504bb93652fe559df1de6a3ae2273d2d609b7e2. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CAE562126401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe826d664b77d2858bc84c08f1b50a55fa106ad65fe0c3a2db9d7989b184637cb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAE562126402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a2f2306f3e506734062bcdb74c254121fb4e1e52843c4238c26d80030dd2fd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAE562126403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd3b6b35604287503aba659570ddd7a4178ad868ded5a20be842e74eb9dd9f0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAE562126404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfad67d4f1bb6d8e3b25701f925c0888a888476663fa47c643cf0005c7284f00. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CAE562126405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437907e3afa581b721af7f574ced7e6a885a581e5a757a14d2dcee307c89fbe7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CAE562126406.
Hypothèse destruction - Oliver Sheitan Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61315e39aded2c9129f54674c3db3c258a44ed8904433091be7ed2ce51d1de05. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAE562126410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a03afb46fe040efe816f3ba49db6d74d66868f91a85995d2ced9db4325ec012. 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/FR7O52200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d764c83fee2bceeb5291c9d93edcaf86a13e01de5658da7cd309b803e0fc9a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FR7O52200190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb962aa0fd424b96c326b7768872586654ab5cda843b8d0bb6706e3937bc60fb4. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/FR7O52200210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71881b0a546b6616bc2a867b7be2252d0a2ac56993a868cf65223f0ea36b2edd. 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/FR7O52200230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ada942e2a0ed589073f164566cf2a19cd9f4967185050f03c5979ab5b62ae53. 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/FR7O52200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fe1678824cfa5311a42e19c6bd464abbbc9e1ca36e5e62173a664b530e0773. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FR7O52200180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c25280cae1d07642d2f198cc8d9f3748f411f0ac6f5b6fcc74a9b1f863eea4. 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/FR7O52200250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8d109c27f97225f59353f6fdbbbc9eadd06d6c30d4271a7b86e2075a814847. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/FR7O52100300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e110221a54b0fb90aa00d72977cd87b7f5c6909ed68eb695804107d523dabe. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FR7O52400410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53baa0eb542c1d837c6bcd7c5d68992c54fdc2f59b34bd59e6479f5d66e4a90. 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/FR7O52500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b51139fc515baeb6963c88042a9938ed4aace88f4c336bb2395eda8e165b10. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/FR7O52500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748363eeb391a9d309d3027c5d7e15577a22becdf87ac2a3eb1ade8abdc8f4ab. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CAE562021213.