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 0xd9b977fb3d51871b23db65a536b2176774a17a0a83a2a73cd498b7459c239322. 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/ad08714c-e876-4f18-90dd-5830a3ab3ad2.json and https://artists.proofprofile.net/proofs/artist/ad08714c-e876-4f18-90dd-5830a3ab3ad2.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 0x71afc58a337e09bba07637c57f233764f5dc69cf81898a77398f841187a63f8a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ESA012289348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dc9c844eb5e3e977489f1ed1d635f0a1f1691af3b843b85d5767d9e28b2ab0. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ESA012172055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fec3cd2788455fe686428daec474912ce96a9b431e43c7c2c15bc3e4f483f4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:48Z), 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/ESA011878476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e15b72315ab1a6508f0e901641651892956a9072c3925063cb463e14fc27b9. 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/ESA012180688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fff28b91e57865c90c5e323af59b8b08debfa8e0feb999dbed9d6847b4dcf1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ESA011565307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fff28b91e57865c90c5e323af59b8b08debfa8e0feb999dbed9d6847b4dcf1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ESA011565307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71afc58a337e09bba07637c57f233764f5dc69cf81898a77398f841187a63f8a. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:22:52Z), 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/ESA012289348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7246e8324b86752d9002e5c161c3b274960e8fb2e6618c63c140122e606737. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:47:35Z), 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/QZNW72231257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d9d4dad9a253c02725ffde3d53b9aab2175a361d40c0ca7a75610ec25250ba. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNW72351734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d9d4dad9a253c02725ffde3d53b9aab2175a361d40c0ca7a75610ec25250ba. 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/QZNW72351734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94af39d6762d8f47a8df3b8f8c0ea643a0893a2bcc29a88e1cd9674b818ae1c7. 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/QZNW72381797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94af39d6762d8f47a8df3b8f8c0ea643a0893a2bcc29a88e1cd9674b818ae1c7. 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/QZNW72381797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94af39d6762d8f47a8df3b8f8c0ea643a0893a2bcc29a88e1cd9674b818ae1c7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNW72381797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f993433ebf81ac4650038c4790520a7fb565c45b6d50322bc89030ef2a7977. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ESA012312363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5389e0c4aaf1dc72284e7e944c4bf5c9754bba9a1c8a9bf5ad816481265c20. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:28:26Z), 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/ESA122475470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b0c2c37e7892e26a0c691c4c24e805730a9970d081928055d431698d6abdac. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:25:26Z), 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/QZNW72409764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51e84f97808b14f865e46cd9283fe7ab0dac6ccdcae55742a26a42ea39b28c1. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PT1R82400788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51e84f97808b14f865e46cd9283fe7ab0dac6ccdcae55742a26a42ea39b28c1. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:06:10Z), 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/PT1R82400788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466ddaa01f728119fb20943a4e793c14648e408facdc5a2dc08aae0e6b20fd8e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZN882433278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca0c2f2d5788d181c9a1ec19a60e2c79ab6fed717c13a515fce024ceaf4f44d. 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/PT1R82401417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee492e24ec0e2a06b015d5cdbf745a8897662442eea57bbac1de6488aed97f81. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/PT1R82501876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca792fbdd15156c01ea2a4ca26b0723d8ca213a8ea588b498676210840418de. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWY2315447.