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 0xd5b61582d70885fa71e614feeea53e374ff6fe545b63129cfe5c5466fe1c7cca. 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/5f81d927-d8a9-47b0-a45e-86bb9414db4a.json and https://artists.proofprofile.net/proofs/artist/5f81d927-d8a9-47b0-a45e-86bb9414db4a.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 0x467fbed6097bb25e002936dc2410d588d52102702eb88e6bf3527acdc38e9d44. 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/CH6542086239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba1457eadf8f1889fa0ef56f7b753ac7f93a49c380e36992a1769c4d575110f. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:54:02Z), 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/CH6542086240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c886b421730101e136e78537a6625e7490924ef7e33eae9d8c7ad039e7904b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:37:16Z), 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/CH6542086241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e4ed73c0530731ad317cef2d7fcc6f888e57de9e346c8eb8bdc998f8e9e4fb. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:55Z), 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/CH6542086242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb69406bae8fab7457c973b9911e36ce629bac6e001d4718017870379ff1e14. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CH6542086243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637808f02e75a23f337fea9e75cb178a76f741f696b4ee8f01cf48c8bdac3aba. 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/CH6542086244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3315cc70a25eba863785b78d5c0fe2a369876883fae8250ab1ca50a67e674b8c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CH6542086245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6a505589ec9d99ed69fa2db122d4508ce9489418c5eb2d1f732124a43083cd. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/CH6542086246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4979404292f69a054518f9d757bd6de57799aafc852e8b65cec83996dcada53d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:26:19Z), 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/CH6542086247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88549756e0acf6296118e3a05fc8226d326646f33bab9dab45f6fd7e7d589379. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:33:51Z), 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/CH6542086248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544c945faf85dc12605e9b2fa39d98b24e107f05926dde52c311f9e4674802ea. 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/CH6542086249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b2f68bff4e1db110a9eff0b466ec2c338066085c2aea542da1a21e98b01426. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/CH6542089650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded1b2ddf5d4d1c7f3565c7e3b0a240336d8a18dbb9a1b56a95208af31dc37a4. 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/CH6542089651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5467b3b2244a8d0c63946411b3d73201776e47a3a84175db350f2053d4b688. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-17T08:51:47Z), 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/CH6542089652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21146aabf4a2be538d7302be5bb0dd90736a292dc017b2edf0d8e3e0b6d54a7. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/CH6542089653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab06d993ce3818cdc3da43c40862843f4b89c3527fb15f281c0cecdb27ee71d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:33:29Z), 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/CH6542089655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626356a917564fe7df410def46ac886e9b8cda16430bbdbd11d906ce131b03e1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CH6542089654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5253a9dca83896f176c1ec041e4306131403bd3e2a9c8118b438f1983da2b32. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CH6542089656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72078a4ce136181511f0f90c5385622160ae4dbf1b7ff495598498cb6920d01f. 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/CH6542089657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a0e200b2f3d10854d10e76d566e93f97e44eff23534d230cae92e9862ab000. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:06:30Z), 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/CH6542089658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec857687ccf9ec1b565348d3d20b7bb92a2c31a9e64124d0ebd81b14fc441bd7. 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/CH6542089659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e5b8a8aa7b309e46420d4c88df85f110feac6f00e016738dc3329ae3e70675. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/CH6542089660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd70357d81e86e6ece5b35ad5024bb23320a72ac78016b9d1a7d88c03325f23. 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/CH6542086250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6d82df6e5021eec31a0dc663ec0637eaa78458cd8eaca8846ec4415e6e9a44. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:47:08Z), 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/CH6542086251.