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 0x0dca51bf35253b3d8fa139ab42dc43a21da29d40ee47adf0cb6ae05a927e0ea3. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2021d2af-fced-4926-a83d-506b797ca015.json and https://artists.proofprofile.net/proofs/artist/2021d2af-fced-4926-a83d-506b797ca015.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 0x4762214f8b74d34e77785274769019b75a6582d4725297eeb6e1b97ec4050f2a. 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/TCAFX2119713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ff22184f2f31af34eb74ec3556b6168dfc957cd6a76ad1026defcc39f468f6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:00:53Z), 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/ES71G2421691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98af2a0d634a81775c717817541acd09e18f57938b5bad060a40783caa2ba4d. 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/ES71G2428509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68978304c0ab07ac62f08881e4e5ce7932b046c94fac7314b0dc2a0674aa17c6. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/ES71G2510350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6659b937e5dbcf71440883630f41c73dca14772050b8a5117bf8b9b4147d479b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:19:10Z), 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/ES71G2433176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ff22184f2f31af34eb74ec3556b6168dfc957cd6a76ad1026defcc39f468f6. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/ES71G2421691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b95d0c6109f0f4e9a504f6fb33455ae2f011a6ec29833bc50052e887f347be. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ES71G2510351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98af2a0d634a81775c717817541acd09e18f57938b5bad060a40783caa2ba4d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES71G2428509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb246a5400ab7ae49d5daeea7e8b4e1eb0d30f17e2588319eb2e780264980b8d1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ES71G2510352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14e6b48bf3be0f6e31186e724808b3095ed24d931fe8561142fe54c5e3f5841. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES71G2510353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a5315485fcb56ae42716cbb8c7c19b19f1890397cd84526ba2c6e285bf290a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ES71G2328523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c52284a84ba44cabf02c54a4a56d1420f8f81e5c8447463a8599fdcfb45a7db. 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/CLTE21800526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c52284a84ba44cabf02c54a4a56d1420f8f81e5c8447463a8599fdcfb45a7db. 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/CLTE21800526.