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 0xaec7596beef922c2fc42df3e7a4dbe9312a4279cfe130bfe3c41517415e7c331. 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/02386c51-cf99-4ded-90bb-c9a619adc9b3.json and https://artists.proofprofile.net/proofs/artist/02386c51-cf99-4ded-90bb-c9a619adc9b3.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 0x189ad967ecdf6390e3a5ab67c0a8dde5d46d9311af62fe2a325ccbba07a3e18f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:57:58Z), 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/QZHN62019666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885e4c86896ff006d558b8f04f6cfb19a432e13247d411e44c77ce4aafc7b9ee. 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/QZNWS2047768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260668164f71258ab720c86e3da05b50dea842a7ea6c75d23fb0dde04b09ed1b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWX2045542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5962569b1750b3b469bdcd2ed4ed62328c57e5c6e520085520f65f970346876. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYX2164870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21426554ff91e6558994ab232bfa762dd04b819927b2bf933843ef551308fd06. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:36:33Z), 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/QZES92156572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f4fe2682d48d828a05920e0fcc7f8d71f7575d3e16045d3af32e17322cc5e3. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZHN42197048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9d5ecad6602d1735dec5b590ba2c71ff3be76a7f2cf48585e6bab712dc0e55. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:30:22Z), 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/QZK6G2125026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3339f5dd6cab53d09627227de194186b9484aa46283b78fd703813cda007b8c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZFZ22261667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9403384d6c6a42c3a9bdc3f2cd2d51160ec5cf2ddc814911cf4aad7e51d34443. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFZ22361073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd9b8792ba586b905719ce8668a90ab9741ae04b12ccbb5e9c70e1eda6f7930. 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/CAB582400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1348ffa22e2ae88b87f34c313d0b136e19de04f8cf1cbf258c7c41eb419061a4. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/CAB582400902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18dda5c62f85ac5fd37003ddb96ff2c70b0abe5e9197a8d0fc018b9a4383410. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CAB582400901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5116e04a37d4b0d9ec7ba9e664fa8822775bc9b059656f6fb1045442d298662. 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/CAB582400904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1348ffa22e2ae88b87f34c313d0b136e19de04f8cf1cbf258c7c41eb419061a4. 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/CAB582400902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f21be4d64bf40bf1a642d77c24bb203957a2851c9a16a2ac0398f81a4d5b8b9. 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/CAB582400906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679c535a693e34e6edb0b26408e0aefa9acf70d29be2bb0df624901f7363e9ab. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAB582400802.