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 0x267ba5de5959c403d21b07c8c24e3b4a08a61adce8057a8b53e8dc84187fe820. 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/d9c4bc86-3896-4801-8e13-572f3df45cf2.json and https://artists.proofprofile.net/proofs/artist/d9c4bc86-3896-4801-8e13-572f3df45cf2.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 0xf8d6ccf96106465591a18c16cf201a51b7a335cdd43683e5679e2a8f67b378a8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ING121300368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a82505af02b2057bf442a8efa62df0cb4d0571a092e1272c8b4ba25f7d5f1d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/ING121300369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e12eff46d3880da5fe0264d4efbe7bb847f1a8aabcfdb22f2016bbfc723e212. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/ING121300373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa370dfcfff569450cb546ec9eab24b6aef8baad38e1d9d6161439c519df28938. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/ING121300374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4967842a82bc512a3dd7ffb9c84103d803991e34851a674c912272ca399e5628. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/ING121300375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe667b10230788d0f6ab11878b6dd05f26eb9df5feb64c4b6eb7f13baee641cd. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/INS181500362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2c5322fa4f48635ee9af999b4e576ee536ef9c77d37d022ac0b9e2215d20c7. 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/INM431600668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966e0683b5cfe7410cf92075721e7e0dc062908406db46422d54d9ca0de762b7. 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/INS181700833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9946e45abdedae97fe144a09c5a49bf3daa99047a7abe41fc1e7af4385c02c6. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/INS181801179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf759a2938f39de69b94fd0d99986c451b58857a3c465e0a1ded1e656df556d25. 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/INS181903725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f66ce2a024d941e70aeeb30a0e6038329de403f7fbd9e27d80ec4c0e70438e8. 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/INP532000844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f8f445222673da6856d62f9f88988d98b007ce9ff7e38a569ed440086ee950. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/INS182100304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59714a19e24e455d21b171b217d812f817fa6e73e4a7306ea017cced17288926. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/INP532100184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc2b9bd051d2dc424544944f3ed000fc5b50911eaf08022e83eb952f2eca0a9. 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/INS182100898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6c54501a293137f1d99649e424ecad808ee21063b60e035cb51f70d0651e61. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/INP532100446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d1ac0b92ba2aae7d9d55a6d5eec18a4f76e4be5603c0317f78989f5a7ae775. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/INP532100524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391336a561f1b661fd200301516794c28799cd5a3219be8918482f325e8e6f6e. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/QZFYZ2269217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2e0cf87020d2f5885978bc56a560b871b6bbe0e44c5cad041db8287c657f5a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZFZ22201074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6b6451bc0f28704122ac23805032e4f4489d84eb53011c727fbbe2548ff151. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFYZ2298228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd58a7a9c9b3019347db777e24996e41b2f38e1fad5199039a2243dee4ca514. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/INS182200170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f0ad4a1235817d60ed06b265d0365cb7a44754153a91e3870b64b0759db84b. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/INP532200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80577df9cb0f74776d2071c7f63b53d9c71239b36a7a06d3f60abdd838faf79. 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/INS182201459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ef607ef52ff1526730f3b6fb245099fdbef8653e2be6972e5ed0cd605818ad. 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/INP532200373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a2b8afb661469d603a31997b0448e9c0e7ad8529f56920278ee9202cf4d68e. 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/INP532300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fa51417499e07306ef8e221a646a5a0625f44bd4482dcd4a41a4fa9d27b5c4. 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/INP532300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2cac01c7031b1f385e17ca315b7ded03cff88ef47e606cb00bafb4d341dfdc. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/INP532300272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca8bddfe21337281519b9b14277a671e0ecbbae274f8fc5e40f84cb7e40bf71. 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/INS182400614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c8abb4c8020b766d1e441513839961c66b645c780615610769972532dccd2c. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/INP532500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b71364598d7684452b73959be59d41f0ac91fa03ce02bcaf309fe4b3c959d3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/INP532500167.