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 0x83d67cbc8504a604324f857aa7f6fa4d0d52f728e460c48d49ccbeff87bcf098. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d34f1cb7-2403-4234-9ba7-cb50d4703194.json and https://artists.proofprofile.net/proofs/artist/d34f1cb7-2403-4234-9ba7-cb50d4703194.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 0x61c82452cd5fd154bba781d53202d478a62569ab5f876bde6386a6db4675d312. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZWFR2547389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd913fa183d32e1389c78904fb4a3f3b89701a0546384ba1393ababa40ca689e1. 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/QZWFR2547392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492641a5f4f9619e6b474cc25474d01151a8f4a7c1beb9274b366fc6b9d2cee5. 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/QZWFR2547393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b825124139f5011f787cea6f08b5ba5cbefc722c9b85a94121eb2b920b2f73. 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/QZWFR2547397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212c848c545849e42d697fef32f1749f8cb16fc3c704dda4fafecd2e73e8d2db. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:57:03Z), 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/QZWFR2547399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecff173cf828ec25ea18b6309fb2e724739e928f2f5665d1dc05ee6b6f00465c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7M2552676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3e39ea1a40605b6ec3937f84986f9728f96b31a321a5c794bbf964f4a61fc3. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7M2552677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524a057b350e3e0aa99d1fd736c80acda526ab345f1603cb2b96dd5c0ab7afb2. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:02:57Z), 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/QZZ7M2552678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1e97aed6451b974673a875f6e99efc2a2ee1a7a55fd2e676b391c53d8f0c9d. 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/QZZ7M2552679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ef2637d1ea31dbe2fa7b19bae2aa7bb579b7a71102293e1b7381ff1c5d5cb0. 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/QZZ7M2552680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa03561cbc360f612ea82a674418e8b39748bbd4601dbb73681b3066db6a853e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7M2552681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1885ed1e93a5596775d40385f9c8ec9aca5472497dcb733fab0b70dbdcb910a8. 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/QZZ7M2552682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7ccd721088bd2ec55236775aebc390b3b64daab509e4aa4ad70759cfbfa4a0. 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/QZZ7M2552683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf312ed2de3dc14c59e7877fe85bb62839b3e633a3d71fa02e49026e343875b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7M2552684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f862412351dffbb034ad60ced87b068d2368c3776bb83b494b711444f7dcc5. 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/QZZ7M2552685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91322b94ef1645b0c98b27a04bc140d7485f43104207cfd699d625d39a152d1c. 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/QZZ7M2552686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c70bee74557f7cf588c5628b719a8307b27e6c5cb39be7de32d9eb1f6e02680. 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/QZZ7M2552687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cb89aa2a5ab6a6033e65ea41ab53d53fe07d6fa56cfd677bb3e3030475fcd0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7M2552688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf88c3d366a547f3ec810a96d8f2d0afd7965e77629a1f878e1b27cf8a8f9588. 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/QZZ7M2552689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bfd361e1234934f7687e3aa5494f216c7c701196c198914531784ec8f1fe7e. 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/QZZ7M2552690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2376a03800e8062dc9ae8ca1f966deafaf1a82e1f4f701067d05171cd1dddebb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7M2552691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4b2194459937cacbda33759eb217bfa48c82c342d1eed3382c121c4243a06f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7M2552692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444ea3bf370b6e1084e0ef9320ed9b0eaf99830d95b3c31a4cbd5bfe4bca19fc. 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/QZZ7M2552693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a2edd9b74e1ca8135498a4829c8048e01d8619c7bd78b4eaaaa1e37b8ac4a0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7M2552694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5fb2ba6a1003745db0dbcb13612b516b45f015fb82bbfda3dc19e5680bcfd7. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7M2552695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82442835b0873fc12d501a9faa17c1642490c8c8ac299eac946d0e114f49aab. 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/QZZ7M2552696.