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 0xb99c5a9d06773f143b33c386b98282c21bfa453fd3048d7f3f2b5da15e647065. 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/862b32d2-edbf-43a9-97ec-d938548a81fe.json and https://artists.proofprofile.net/proofs/artist/862b32d2-edbf-43a9-97ec-d938548a81fe.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 0x1ca55c3eab31c156c5c4c6518858480ea0c7cf5bae9a78dc8bcc8f0ab3f4e63e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZZ8B2379764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f2e86bbfb5a767547dfb647346ef447ca4258de52a8c65d40d6ab60dc15e8e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZZ8B2379765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf233942d69c2fc855cbb675f1ea67a631e37c8ada450f7ae2c06158aeca4eaf. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZZ8B2379766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2814c6a91c43bb561c904d238dd46cc16995631b9bf1306ab2728f5e07aa549. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ8B2379767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1518405f48b5cafdf176694f4cb09feb6ecb87712d542bbc1c1be3217f1dd596. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZZ8B2379768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25da27fb680af8504d15a684fe25cedd2e70dc01107933b8b60e943102dc6e6b. 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/QZZ8B2379769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382eb68871eb8d9d3b8bff76c03bc3137fd71dcef1867908c7b7b484d6e86b51. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBWUL2490947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1903f609fcb709a6129083cc807cf5282665de914c321a3c3aa359b698f47d8. 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/GBWUL2490948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79542d844ac3ab3093cc512e0309d42d3789b091984554b843dab92323734e40. 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/GBWUL2490949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8474e9804a1ccb1f2668d43503811ca9e0ec921afc6b7d33b7b0d00042335436. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBWUL2490952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bb755bfe065fb4ff2bdd287bfa08f2a59f2a9a3fd2913183dabfda19aa70b0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBWUL2490953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6171ab92f10dc0967e6fbf036f76b1fed985696f12d914b226d1e97c6eda9073. 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/GBWUL2490954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7232e43da872e22cfcde6eade6b50ed5a00e1e9f385b659c7df1dcc4d8f8d2b. 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/GBWUL2490956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa075814e262ee8324cc8bbc080020a38c54c29d84cd8405036cace6ac9f0cc16. 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/GBWUL2490957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b6082582d8809c083a2988b1da6a43a5c934fff471ed536e99e9b192834c91. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:49:43Z), 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/GBWUL2490958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cfdbca08966da9e63cda93bc6e5d0496a537b8cb1e6815696e0ac995eda84d. 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/GBWUL2490959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146e3f541a9c5d0142cb154e32f153729ca42cd9c6e98a3b9d9a41eda7ab01c4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:10:37Z), 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/GBWUL2490960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a921a3d8c48596e2a1d4e0daf1914f6121ff67d52a93be115e6700e216e646. 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/GBWUL2490961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6982aa524a30fe1f384139be005080a55e90cd304c3e9d622a4354d57584827f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTB72434298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3292924f8ec6f6df0ab94770d6994804b7f2ff7ce497363ae73e670b42a021. 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/QZTB72434299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5983afe06feb8bd363b05c058d5ea5119ae565ffee5315c065f039fb3515d9f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZTB72434300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5db91bef5d0803b4bdd9695185fd0f445448612bd84f7b28f79066aa121406. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZZ8B2455524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2643f5492bd3671c19c2a03e6bd72ba3705f89b234aca3a599e03898ebacabb. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZZ8B2455527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb2d268e9477c8e874ae21bffe289a1e74782e3f8133835f601439d1c1e223e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ8B2455528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac81dce943aecc737ca29aaec22628f45bc0c9d20995e9374d5babcbfb8549bc. 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/QZZ8B2455529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01283722454dd692336fabb208766ca8f84c4eda6a23a02c11d62b147a579c26. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:45:15Z), 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/QZZ8B2455531.