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 0x8a7238c7348ad98005086ae5e351f2a03939625e2f7e650a55c429502a132808. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08a13b02-9031-45d5-9018-ed764a2d24d3.json and https://artists.proofprofile.net/proofs/artist/08a13b02-9031-45d5-9018-ed764a2d24d3.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 0xd8358eed0c46f641380b71ec6dedd80690bef2b530e74ef3417ef4a15f91730a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NL1AP1800511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ace972d49eb89c32dee2886d36ca163c58c3b3b438feaeb2ea30b70ba447e3c. 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/QZFZ71907037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb8c63b71043810310ce2380cd57300572c3336846fac23424db9cdec1465fd. 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/QZHN81946039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde0e85ef87e650de2ec79253b917643b40284a917b78c71e0a59d799204a37f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:54:25Z), 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/CH7812046013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7f839801a281e4e7484510b8e8d1d9f1e03f8432ebf5d35a775e37ecbecdee. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:11:58Z), 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/CH7812055173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8cd3ad4676f2746cdfbe644505a1e240d37e43f145b30a4a4e720d05c45594. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CH7812069419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782e923c107bbc0522dfc20c1af6ac0bdf20fdc19eac69212d548e61f6d376ab. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CH7812072672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358d1badf98d74312536ddd8def6d978f2b7512f89d47bd09679e08275aa0293. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:56:41Z), 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/CH7812072673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bad03423f0f7dab197bcd15d2134a858545ed6eaaa347c0abd49bb04327582b. 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/CH7812197869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e63df3de343e6a9f29c65599dad8f2d483d78816cdcf898fd79b94ce4f324e9. 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/CH7812232244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651cab29fb72a2b9575d646aca883518b046107dcb453ee49de2bf98244e55cd. 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/CH7812240631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae384327b37c0672aac57ece4a921a406dcdae4ded086a3cca85d972620c1339. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CH7812346378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3db7d63e0b7072961109cc55790c397069bb130fd61dba17cacdd91d02d00ac. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CH7812414754.