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 0xd1a7cb8064fbc24748e55ad405a455532c51bcb0d506970de25b9f61796646fb. 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/754b609b-2e84-4217-8e9c-f93f3fb7e399.json and https://artists.proofprofile.net/proofs/artist/754b609b-2e84-4217-8e9c-f93f3fb7e399.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 0x3c1816b390efa1fdad0936f99c0e40f24f5e295995a999cd51d83bbc1b258464. 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/UABI11600219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9fb3b8b5d566d6beec5be7736409639dbc89ac7885650070baacab02541774. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCACM1654780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cfee3a4051957d867cf6523136d68e03a59b5cdf5a3fa5a3084657b178ae7d. 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/TCACM1654782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241f00be3f99c2a893fc36f1de20eac306cae4b1e99659b46df22978f10b7724. 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/TCACM1654784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a791ee39af61f29a01715a8380e8e859dfb6d5707e7d6cd7e2fb822981dba33. 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/TCACM1654787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4beb2b13635014b3bd72c2d907a8163598ee512d9694e46dbb8928a95baeba4. 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/FR59R1467026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c8e3445fa0cf2ada88fb3cafce750f0e949567b7126c98c9a6c38c46c67d7c. 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/FR10S1533775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65da5ebc03a0ccc02daf9e84b1222d6d8b38bbcb31c04f65852b22711c5ca6b4. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/FR2X41431343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb255760458acd73ed4363740af428eba3c0a0362c72f4820333e0a61d9ae58ba. 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/FR2X41431344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1dbf93e04ed26f9d31713650f29ed28233eb6befbc9e6dcd1e50fd0676418c. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FR2X41431345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061b8d0867c6f5045102a28e308727d4d6255b2270c51b724f907a6b6ddf7dfa. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/FR2X41431347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e60451a4249398539d06c12dea92c3133aa362bcb18766503918ba7b8795196. 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/FR2X41431349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b2853c4f134e30f1d50c62ab8030fb4ac4d9d939574efcb5197691be110c19. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/UABI11700106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51191826adf4225d09fe31d56f4d96907c3c664ea255c5bbbc09bbffd19b8a4d. 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/UABI11700107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc853578ca2a46ad9d050cedc5402be8f24395f7295d5576e3d4788b9f41129. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/UABI11700108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3b602a497fd075b167bd3e9f6e729e141c38d2b9822241ac2ca1db637d335f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/UABI11700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ca5fb20e0ff348253a0bd01efd46c0e771977bb39929a3dd965dd04960f9f1. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/UABI11900071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb219f55a844a8db088c6990103638939b419d6f16b8e0003e91ab218d97780db. 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/FRX281941471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292bc3be06866b7ef2c536be5ba3e515c492bac6fdaaf54a1d83b3f8145472cf. 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/FRX282019672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80feb53dac45ba3b57815bfbcbe60566e9fabf8d57aa7d07f45b46465ac6ebdd. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FR59R2457261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e34ca0d299ee4cbc00e9be1dbd187bfaef5df7c3bad3c57329d0dcd1df6813d. 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/FR59R2457263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdbac594709e48077bdb6c613937b3792d4484ab2ff53e11df4c72767796721. 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/FR59R2457266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23ab77371b33939b12417c76e3c5dc438401f38f66914d259db199539a07374. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR96X2561462.