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 0xee20edaaae24d6d05edff6a42d1140db52f3e32969b156bdd12dd47ed6aeb643. 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/1cf61452-5bf6-4f75-8bc1-a7ae88d94913.json and https://artists.proofprofile.net/proofs/artist/1cf61452-5bf6-4f75-8bc1-a7ae88d94913.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 0xa803ec75232f33858ecde30f55a9a96e80df44e0914ed7ed983eef3a10c85629. 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/FR2X41802524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20168fb6ecdb82b454bae963a838f9ea9499e5e2b5c79f401db4fb8d804f267. 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/TRBCM1800097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cb117d6391be35d7ce9ccf1eea14c8308df1a0ead5a33a91630f616c6791e9. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/TRBCM1800099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472cf4b823505a0c558343bf9eb42dd9a7fd98183a9c4036f2bf8669a44b93ef. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TRBCM1800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f532cce5910cc08e50e64f13ef604391b8602e9f282abdc735dabfda9850d7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TRBCM1806273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42ca807b974f926f87f42d575086539cd0d29e52d2766dbc666b59aa710678b. 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/TRBCM1806275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9442de2214482b0a18ff956bcf62acf913cf7732a722cefbe7f064e468307ad8. 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/TRBCM1806280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeea0b51b9ca43628b1fb8909b94f327dc73481c4129d79bb779cd3fc54556e8. 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/TRBCM1806282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826bf61f852ae128d1d739874fb98989d4363b72710fdc36e8b8ce26941ba05c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TRBCM1806284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6449e72eb8a64a74806fc5a326bafdb33ff72b9fb950719f0c651f6001212b7f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:25:55Z), 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/TRBCM1806285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b07e829bd38781c74f8aaf4c2a4bb623c4a3b55aed204b974fae1ccb01c1932. 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/TRBCM1807021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11c53d8875e20d9ba994b31574188c23883f85dc050e97f2f3a77e392e85969. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/TRBCM1807580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2349713fa630b11299f515b73d58e38e4a25664de11f225dbcfd6acbf0974de2. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:03:22Z), 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/TR0532114499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0f30b9bb6f095f487aac9d53d87d754fea03236b4a63b8f11eb4030f7c9873. 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/TRBCM2200234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760921376b16c7a9b2d15a4a04365eba07fb893a8d542cf9b3ac79a86a06c27a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA0L2373440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4597345011650efc08dd0d057a95b1dc2922d9eebb8bf68b548b73392a3011f0. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TRUV72400304.