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 0x3565fa031559bb88ed910a257df84627caaf6d3abc8671aa0fa5ae505ddca314. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/290135cd-4841-416f-9929-cc86ed89a02c.json and https://artists.proofprofile.net/proofs/artist/290135cd-4841-416f-9929-cc86ed89a02c.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 0xc59ca55a792ae5f69259076baf4416480e8a3602ab1faa66e3c75674b5d311ba. 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/TCAGN2268989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c364fc602c40f2d8d0e40a43e078bb8221ea2c5e018ccbe36ee684fa584d660. 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/FR6Q12200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500cbb99c8879f486eafb319a85429d0bfb634455abbc4307ee6ceabbd2487dc. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/FR6Q12300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992502bfc129a1e9e8e7956a5031a3354f16d6a24e9c88d713282508974c2a37. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR6Q12300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d36b78f41eaff9388422f2bea48d189f80d235d954ce1b834bc7f6d6842aa97. 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/FR6Q12300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b3e7e99843ee5fc42f5ec8efbff2534fae87715c0acd91c9b0a43f701391d3. 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/FR6Q12400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97c73c5e535b126d926770189362ccae739c806b741b7efcc0fc6af3f4fa6cb. 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/FR6Q12400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ea95d70e19762e009daaea6d9bcc5d89402ecf3a7be32171ac894f9a0e68cf. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR6Q12400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5401040b110c637a9648a8e3ea51d9f87e38e323d7f71580c40d7967187d2c17. 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/FR6Q12400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e0e9581a9d754196bd46a92ff30f98534c728767e44341746d9be85f742300. 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/FR6Q12400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6b46e946a092f7435f6c3b38b6e814c98dc947e91ee2bbb2d334ea7e79de1e. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/FR6Q12400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1338d81da2e70c46eb6d1225c6d0157949f8f2b183f1dbf8c6bbf849dbcb2e6c. 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/FR6Q12400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9851db41100ca65e2b31ef0cfbdd28ae161d8e1a38da2f622af5d601eab24fb4. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:01:43Z), 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/FR6Q12400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b90d729336c7e21c8ac49398db4876f8a8b5c8a94c888cccfe1279878a3598e. 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/FR6Q12400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ea95d70e19762e009daaea6d9bcc5d89402ecf3a7be32171ac894f9a0e68cf. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR6Q12400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71c115cbbed75092afbe8e8834c11461e5b0cb8181ea52d756f6c8bae3bb6f2. 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/FR6Q12400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25396f1fb1e594010a58c9da8c4e93d87d4822efece240e15db59c9b7d61ca2. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:27:39Z), 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/FR6Q12400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97c73c5e535b126d926770189362ccae739c806b741b7efcc0fc6af3f4fa6cb. 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/FR6Q12400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9851db41100ca65e2b31ef0cfbdd28ae161d8e1a38da2f622af5d601eab24fb4. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/FR6Q12400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7582bdb145b415676e1daabb2c9302b48ec4927c12ac543be612a6b0ac6ca748. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAGX2354435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7582bdb145b415676e1daabb2c9302b48ec4927c12ac543be612a6b0ac6ca748. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAGX2354435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18339bda40cffbb144fbc5dce5936111b6f6e8059827bb51862af3e2ae6257b2. 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/FRR642300714.