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 0x221fa2b8e6c4469f83a0ab11ed0da1ff55850ba815dc6f11ada4da4e41430220. 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/3eee8d2f-38f0-4cd4-9deb-0a5037979f84.json and https://artists.proofprofile.net/proofs/artist/3eee8d2f-38f0-4cd4-9deb-0a5037979f84.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 0xfc6434502c61808e5438afd4ef851061266531b88604723211c6be9dab0a20f5. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/IDA121700901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf90301fe27fb732629c5bb0279ae6a491a837ad90ec45547892ae9ffce8fbe8. 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/IDA121700907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1c07a1ed59e73e6b5e6eceb4bd7a787f0a11675a3dc272a5660cbd7f77ef3f. 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/IDA122100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ced0efbb8c8861973909f6431856b25f7663fd5fdd9277aedd5308e28d1607f. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:21:54Z), 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/QZN882214614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6f6f190d77c07dabc79584601b151d2a2deb4f1f9f1b5c8e544809aed80858. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/QZN882214749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca96f11614f2fd6ef6a6d9fdf117fc83449fb44bcaae143862b707f17428ffc3. 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/QZYFZ2302195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb1ab040c9904b44d7b7ad72a984ec8ddc89527afc4160ac2b1f9685eda8e8a. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:53:39Z), 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/QZYFZ2332391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33a3ae887e43a5be2ac75df82c99f2b35d9198bbd9b01dbcf23acc2527d1bf8. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:44:39Z), 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/QZZ662312127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86b22ec729ee33c4ab7b6466e286c114f1748ea2d2f18287c8f0ef6c4bca186. 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/FR59R2433160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491b0ac174d5243516528f97425f6a1a0784cf3e5aa26b2203ddfbf3744bc0cd. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZYFZ2526110.