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 0xdb28c99589caa6e7e66ef7d6e8b9a76be5eb572966d9c65012af2cf4b7c1fac6. 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/1d848e5d-50e8-4840-8cc7-423d37db07b1.json and https://artists.proofprofile.net/proofs/artist/1d848e5d-50e8-4840-8cc7-423d37db07b1.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 0x62abd1acd710ad3d15c8c3a53893ca5c0b20ed11e529dbabfc4f9f00354c312a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZZ7K2531295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00adf1b2a32dff25d5e7700bf97057411e9c438965ac9069fd500aa903d784f2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:09:18Z), 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/QZZ7K2531296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab43e5844e06f767892115927ec2f015271e85e88866da8a48c78ed004e04c3. 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/QZZ7K2531297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198d89163ff9c2c7ae7a8ce8595aacfd352c6b84ae21d35e1559d51b78732084. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:59:07Z), 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/QZZ7K2531298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f529b63cc7d063ebeefc867474b5cb26bda4b874fde91ba5c148c1c042b26f. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:23:17Z), 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/QZZ7K2531299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f486b678cf744d967b706502fd526ea24939de5c637d8acaecdfccdcc211505. 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/QZZ7K2531300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07d9429b2c8bef5e5b464936a1aed1f22c6d0d73c5aab7026133074263cb19b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7K2531301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a3832647cb684065c059f5eea598192ab70a625fa484873bb32d75d79a9165. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7K2531302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766c03a099980d9f25ad30821554710523b22cc57826549898680ec53f871086. 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/QZZ7K2531303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0523325e113d2b858ca9217c727d2947a0de1d7be6c88ecaef50fc24b07fd088. 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/QZZ7K2531304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd54ba2a1f8538fe21b830ea8d6ea0faad4037795e646ca65e824fbd47c6ba2. 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/QZZ7K2531305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9150a15ddbc70d39d1cea46cf186359a338f7104da051393b60b10932cfb60. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:01:53Z), 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/QZZ7K2531306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942254ea5cd08ec4ed65885917088a809d8519e2585fe049cfcadb36ba779588. 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/QZZ7K2531307.