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 0xf4eafa2000abcb5a6e25fabcba8924ec985984a0959117ba446f326c2627ad67. 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/71c46a10-b63e-40b9-8e48-9fce4ad8e5d9.json and https://artists.proofprofile.net/proofs/artist/71c46a10-b63e-40b9-8e48-9fce4ad8e5d9.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 0xb10788f1cdf45ec4994fc79fc383ad03d55180015ce13962159a5bae6e8e424f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:28:42Z), 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/QZNWY2044184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a3eaa355c60fcc0bec6fc63483e299b56a92070579604085f2d0213bc602a6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM3DF2190520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd636bb5f5ffe9716212725f536f87cebe97d10e95c5adc138a4747b0386a0481. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM3DF2188092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3f4a9c4abca9f1f56596d3bca3167de97e7971c9e3e1080276f321a4c301eb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM3DF2190521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0874341f47649d9bffcaf440645facd55269210ae219dbcd5741ec6cf705b5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM3DF2190522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1d3b6383a023e8dddac8ce5ba2bf3cc4b4775de8cbb9d6115fd1e6444be707. 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/US3DF2167185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc811a8b29d12b6d5883c0ea57a272a0f4ced6c237562a0f1eeb5470e18e8e167. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM3DF2190523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b81c02adc07267582ba4552fed851e473df7f43f2f382f744364eca9302a54b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM3DF2190524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9f99b83705b461dd598acdd72e252b21d998b8e115f927cdea9d630f895767. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM3DF2190525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3e47d42925cc2b2f71de311c99a3abd5f2a22413ca40eeac5d5601b678947e. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:08:55Z), 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/US3DF2241507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d518d802b18cad055b337695bb26387ef9fb4279e95e8fe239f55ca241c226. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM4TX2255260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5584da7cca5bf26e29b98fed149eb8f5a4262bafd5dbfcf4d81b2f09ea88b6. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:23:54Z), 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/US3DF2297909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec3f0fefebaad3f5e36789c46662d614ed542e2071772fe6f4218f62d6e2721. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USANG2223887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9230b9a62d8f60e78271e9fd784942a38125de38a1bfe53cc2e48225f7467b. 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/USANG2204969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69201bfaa86f502aa6c6b8696ba68ce6ef10ee4c1059e24d4f99c49b3f45a044. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/USANG2270913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9aca1e66ce738050f5598e923bbb4cb0b6159b60096e463057d3e5b9728cf28. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USANG2411726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db621cae7b5f970b588833aabeba37b096f603792fb2933e8890ab900b40719. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/USANG2508061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077859c43eb54403e038ad9cc4b9e5dce5dfc0d87cf01bccd3af7c1671ab3934. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USANG2428538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e8b1156c7560da85cb35bf8ebd782aac532bf0c8fb18c8cb511f5bae68c5c6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US3DF2492234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9230b9a62d8f60e78271e9fd784942a38125de38a1bfe53cc2e48225f7467b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USANG2204969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c973b6aa160c55a34229314ffd12267182559d5e038554ad6e08b43a97371e7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NL4YD2200218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8ad393ade415b1210ca62beb9de4fe9051c1e114c8319a07c5af01460cba7e. 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/USANG2260931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd34f435a201c7b455c4feb1b02421e64861ff3a8dcb1b92fc9dd6ba9a6cbe8. 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/DKADG2200442.