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 0xf255309481caf39d2b917ff537b8b3bfea846c10cc68950b0e78d8c5b633820d. 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/77846b12-5a70-45d8-a851-f51e7cdbbe70.json and https://artists.proofprofile.net/proofs/artist/77846b12-5a70-45d8-a851-f51e7cdbbe70.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 0xbff7dc5421f4645f3597362db51ccb0a94bbf477008ad5e5bb6bfa48433f6306. 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/QZK6F2126361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8098a27e526d7399b26c2733df5ec2359d76c034b0971c21029b4a88123427d. 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/QZTBF2304046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0445425c4f1cb665d6c3f586fc52204d158b03e7e8ebe666eb7eca3f23c627b9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZGC2305210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9348ea3be88da0b1d5f398b92ec0ddb97d6e3d84dfb56416e5005529a62c4cc4. 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/QZMHK2310181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f16f1cd4cb8fd26e2deb7ffa57706b1ccb463b9bd56eb72d3c2715bd4da68b1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZS642251401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe370aca78edd78defd6e1692f460b3ca6034b605078aaa439830ac7423e57aa1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA82236566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaad1150e556c983811c6cda7cf32ecc6db9df8637cb3ea9027b5a2b9a0bc1a0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTAU2180301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e261005face17b0f2946ee8fbe9e84a1f41bdc686d2785bf1a1ae3c73b6620. 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/QZRP52158089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca22bcb77074b5b922ddf7482193cdb03b1e2e2197a29037e610c49b3ee6de19. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN42130737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f2824e9499f1b355d7d6ded579e84a7dac66bfa75edb272c73b5368abac3ea. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMCE32100137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a63a4f0fa9e4091b63f3a0070b5feea42a38142c32fffe527611c38833babb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6Q2067510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd7c2fd07fd02ae44e26636b8ce86cc0d1695503dd0f212aa7f9280600d136e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN81981184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fe281a9bb4d62bf3992edf241587884fa16f6ce66f340e0d8e97afaeb6ca8a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZFYW1956355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb977fd43d16a64bab5cf672aa16a5119c6ff1eb192f01b5a0f7b069ffa0e05. 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/QZS652395686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba02652e68bd5a39fffeae27e2ab8e32656afe3fec0f4fe76fffd9655d1bc7cb. 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/QZNWZ2020030.