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 0x6537a170035a2878672cbe5e96fff59cbdddfde068ac099a181f6557804fc290. 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/17ceea19-88cd-4446-9c34-f95429ad8766.json and https://artists.proofprofile.net/proofs/artist/17ceea19-88cd-4446-9c34-f95429ad8766.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 0x18647ef7b892ef0a969f8ead4161a109d8eb2087001189873c257e38084dce3d. 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/QZWFM2338039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ae141869da6329f8537b19117899977e9963b1ca14de457de87baf7c392541. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFM2338041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d733a3192425e92fa87893faab85a0dd6d08d62b84f2487fcd1cd0a93422989. 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/QZRP52348678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399dea8d840bc9a8517bff2ac2798cec1141251ee8e440763a2945444d1a0056. 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/QZWFM2338043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fa72db076333a471f391797d4462cf133b194c7cf1fa1006c57d6ee1f7688a. 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/QZHNB2447649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816f2f1355d13d4fc900d39a9970b1262f9bd8d08ff1635c3c8fe6bffc03c12e. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZHNB2447650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65723ff2b20675b51783e708e0e8f149b63807d3cf7bbe7f105b52d3075cef1b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHNB2447651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae70b97ee69653abaad4e8895110330b477971e8a202d86f902ac7993270eff. 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/QZK6P2462277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa930120d60d6b06307da6cecccdd86ba62dd5de2ab7f8286eaeb8e9475fdc24f. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:56:06Z), 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/QZK6P2462279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05b9b49957e3d87e7e0c8dfbe5528096469078b2cedad4dda0b6a2388c2b273. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZRP52478095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122585aa42deccf943f8806d8b1b8ae902e7e7563a31166f93da590fa803410f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:08:39Z), 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/QZZ7U2453697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c53fb2fc304a115736abd2cc835432616afe79bffb570ba5dabfc9b3d76b4e4. 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/QZMEM2463983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c5744609a29783276bafd3be28a6a8fff102a38f42ed1f872f630550830494. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMEQ2400323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a7541e42130c5a01d3485eb91554c92aff66a850c9f4367af69998cfb7ba97. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTBC2442652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a93e034b6fe991514f68429e0509b8ea8bcce6bc69dee85d2413fced75d349. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:34:56Z), 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/QZZ7U2481775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b6e81f34bc1fd150ddf2edb126a33e69334f74a2fba8386a0f40186dadb99a. 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/QZTBE2486570.