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 0xd9a186ded6965f59878f05cf6c5054e1881da37ec5ce3d00d017d2fb443854e4. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2cc171a-87b5-46f3-92b9-cd9d8a858bf6.json and https://artists.proofprofile.net/proofs/artist/f2cc171a-87b5-46f3-92b9-cd9d8a858bf6.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 0x2eac1544966da8dacb1237224c28861d732b714f14e3187f5a63b322d5f7f6e7. 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/TCAFJ2187653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683d5eee8568f28100960d7c42e07dea00364afeb3a62fad81176af99b780930. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:51Z), 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/TCAFJ2187662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84576666fbd7e00919eca43e9d618db9cf71c04de61c6cd1b8a4ee0a4ad7ce90. 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/TCAFJ2187668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf377fdccefcd9d8bc5c791af6ceeb2acc9374c9ccd40b792c3570d36d3454ad. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAFJ2187676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf942770979915e7278d03a278de838ec541d7880482682e27e1154b8953411. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAFJ2187682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cecda0413ccd68d79edd38e4f9be6230d34e9cc47cd408a2cfab688067e76d0. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCAFJ2187691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd63904ce5f9b9355e5e25c98b8ec86deb36f5febfb77c9a2649c87fb1532696. 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/TCAJB2484794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f515a398a732d42155f983c03edda7c85f6c499d1f66f838dd37740692d259. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:48:28Z), 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/TCAFT2181247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7413a1a2bb3886a631038d905ab609af8a56538e73dc23ee61c10ee8bf471e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAFT2181306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a27066041cb4ad352fa6a3d4802bd000978e4541075b494be74e63209b07435. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:31:33Z), 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/TCAHP2327764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c60352017b5633fa148b01a32f272a87dda0c7f98354ea243f7bc0259e91fe. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T18:03:50Z), 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/TCAHW2497478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572879b5d6c306f572439bc37a853ddd385c3d659b43733712120c93074754bf. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAII2440253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a4cb674169c034ab770dc9fb1c5b641c8865cf07e8cb0168a75220d3454bf8. 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/TCAIQ2488026.