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 0x469f39878b765ba9270f1f70996538306dfdaea15e687fec8993223c3b585b31. 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/ea88452f-9896-4ddf-b551-631301810e28.json and https://artists.proofprofile.net/proofs/artist/ea88452f-9896-4ddf-b551-631301810e28.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 0x5761a67bc7f1da920255b3ec23b0fdbb069e837b24dbd0ec181825e9588dc310. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:07:15Z), 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/FI7RR1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f228d049061fb94d70ed8c58c76361b3c0640e58a3b44c439b3bf6b48d275b5. 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/FI7RR1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5574f1e149c21b7664b6fd6b406244ef6e8ff6d14b2060f7a1658a35c191a621. 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/FI7RR1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd28fceb8e928af29e026892df686e610433df58a41085e9aaa8c448c1947d5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:01:39Z), 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/FI7RR1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b180d9d14f1d526d2541495267f0cbf3b3fc7d08318ac71130e9d285ef7938a. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/FIS501800091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b98548b9971580243db95d1f9e1d1563335c0e3dbdcbf1e9d95a91bb3337350. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/FIS501800235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726d67fd39943564128945a5964af8404c245e50078e76080cf2e1e4a823da5c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FIS502000152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2116d3a0c7d4317f96d063bb02a40bf729a5e84d74176bcf45338c93762f427d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FIS502000156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1173371110bfe6303621ff838ad1dae69f3dc63d08546df0fa16bd3b122a99f9. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FIS502000270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901510333702f74d21c4bd842c896273792377cbca80a83be727ebd2547153d4. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FIS502000286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60cac25a1258aab6bf1289216ccb70ee5b0a584f043292a0b776deba3fc92a3. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:05:49Z), 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/FIS502024288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed98b3545cbc6c84eaec6290fc1f339d432daabb925e42d49e2ec38107154eea. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FIS502024304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf180ad190cbafbe10fd9878852cb1974f962d576bd60e9ad2289c57ae58dc7. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/FIS502024309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cb92a9e8a7cf83a8979df50973ca245fde0d10ab2147e4e83bdbe59b729782. 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/FIS502025439.