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 0x0ac0c68a96cd2a2c784ac4ea5b980b825426c534818a37af2e97428b39cda54a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29700567-cadd-4c74-81eb-4acb7473dac5.json and https://artists.proofprofile.net/proofs/artist/29700567-cadd-4c74-81eb-4acb7473dac5.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 0x8da65ad87724ca862005d63852aaebff78e9a7ca93b0f3c1ba29ce157550f684. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/CAEAZ1700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3328e2b5adb42a0366fa1195f5c249bfdb9cd379305b1b38cecdb5ca79b05c44. 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/QZFZ42067707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81de9854a97d477ce1afee41ee0ed9fa41407eea51f379d595d23d24196239c0. 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/QMEZE1899282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c50d353b8faede9de05bcaa12a1feab4dd74650824aa3cc097816371a7ea77. 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/QZHNA2145528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf674797cead7047368dd8ec63a5ede35c4e7c9c4e22a681dbe1773b0a4e29d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZQAY2341607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450df3a48fcf0a7d1f3763712ad5f1701c4d37299a808f900ce49c10b8fc8aab. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:33:48Z), 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/QZS7J2317544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcadbee66941fee9182df65c3999c266b0e7fd9b766ba77de4748146098db2a0. 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/QZS7J2399108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eea361a1697511758693285a37303046f9836ba855dfc89bd46236c0c6ad757. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZS7J2316255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b89cc5ceb8e9cc4bc85ab7423ca09312b2c4b4abec9ac1cd3de81b02c883cd. 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/QZS7J2367221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d31b80474788b357966ad6956eb1e3f8255e7146e5a3d284c6e36372768f889. 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/QZS7J2424108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a169d8f4c11263360da1df3c49e1d86c7bf94af45e3b9ea67c375a8a5cc2728. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZSYP2484234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e9d4764ff976d7c8b6df4d76dee73ccd7019c0365d317ca7649e370c012c7b. 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/QZQAY2537575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6a3b456a0c42a871f5db777b4e7444d538c1755c828b18c63ff2b8b5e4683a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZQAY2580211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7204bd2f248f239908b2e5738e28c971d42fa557ab26ed6141861bce9b2c1e3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA6D21900319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c45716343fc2f2897e35bbc3fbbc54651102a9b835237953eb7cab1300074f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLRD52042576.