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 0x6e5959257c20897ee9e67a698f84f2681b72cd80e6a5dd22ed97f52443a995dc. 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/ce17ac45-3bdb-4ced-8d23-b92015314f6f.json and https://artists.proofprofile.net/proofs/artist/ce17ac45-3bdb-4ced-8d23-b92015314f6f.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 0xc523cfd7887438f681ad8a4ae3eb4f41d4cfd8196125ca2030a3c88813e356b9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZRP52499233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1695b6e7c59110e63f0782435c9ca49a4d52480fef75586e5df11e51d0ed6f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZRP52499234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9dd6704b8afb21641a9eaa45dc8b7e897948c65fb7d8901fde475adba99dbc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZRP52499235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f392b3982f9579b96fc5997677858a11fc4f719b8622e05dae71e1e8628343d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZRP52499236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2947e4082e19e3b4d6db2704a10c6ecd9405e820edeea4c8b8f96b880d11e1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZRP52499237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe563314776cbae75c8dab9f03641dbf93d36d87d619194ecfed8bdee4997ef19. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6F2443281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ac2bdc90c42b28989ff140b9bd1aded116e92c6fefabc3b5b058b0052cc5a0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6F2442196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8937ae221e0070373df768159d203b5bdd4afb89a7e1f419102d0cc0183429e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6F2439890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5e94a271fb10754be480ba36fba78b1d47aed0e9e9fd76496bd64b0e848571. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6M2427302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067942a7984b100e09790ec7cd42b0c6fcdb54e5193e24de2493503fb9fb4d3a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6M2427301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29245e1c844e56f38fcd733146024714475a4cbb47bdb08e98b4be58f6a96d4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6M2423450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8d7dce70c5398457dea9c6361f28dbdc70ececd4437acc0f1760e56d041d20. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN72440897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5831b6d766c4e2e2bd5e23b425a97493ca771bf201d1f40b2f5f602f9307e43. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN72440895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abde0d683dae45bc45b5d00b3ca16a386e103247e196e27931b3651e451d327. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN72438643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0f28d90b0ea782e431d4dc2b865fb869afb8098fcfb11fa1bece23d38ac351. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFK2366184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fdee13e4987cd11f8c798e808d114fa49330b328f834ab4cbaf3c1f2e4bf12. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T17:02:44Z), 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/QZWFK2365374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f53e750f33dd802704475545cd3cafe5bd5cf845be5cf897eefa60740d41fd5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTB42344647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5cc86241537bcf4aa2ddcb06479c23ccc239814ae98def0a198d73e3abec2d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB42343696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3675f04ad7ff99aa0d598da964afa9944125228271c103df41ef42e3e3aef4a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWX2379635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4182e8813a21a0d3ed1451160e49c3021c60eb85ed9e65a1b336a533ec2956f4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPLR2369349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a9f6833a7608b809aa30bf5ef6437fc2c9229c76f02e2b25357957eac802f2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWX2379634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9fb6b4f90426e7475f458c4d388b85358d0ed25784fd669e567bb1d427285d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWX2379396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acba213fb2d0bfcb86d12f4b3f8fddb2ef0a540c7273c7da1e422b6775a7fb9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMER2357334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf185dd4a722441af9406de2f80080703d5969d837e9a3b3fbecfe21dc5d0816. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMER2362099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaabc78586f5e8caad0559225e8179f43d6e04c810e8eb76149abc19ce85dbe8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMER2357329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98623f1e12587f421714860cee0303b0a1cf0ccf5ef5ba1e849bdfc0508532b1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMER2355671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c949ca7fea6d6829c27815351cc87528a505188bd7d5652012afa72916a7bf9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMER2302838.