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 0xf23846382866af59871b9a368a8bd002bd611f5a241da967da5c700744edbac0. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc925a9a-2032-47f3-a415-53f19153a786.json and https://artists.proofprofile.net/proofs/artist/dc925a9a-2032-47f3-a415-53f19153a786.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 0xd756e6de136b5bd3e2f905d1898bd3b67e31a0536c2e6775e5f25f8da10402c2. 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/QZZ7Q2413188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0d9bc0d504f0a57d7dbd150955e3acba79ed519d275ebbc965c628a29c6790. 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/QZDA52563411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d36bde1068b80d8df3ff4048668926f8e3f368d02daafc740deba5742076253. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZHN62544453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b6b9cad2b1fbf62d7f44ea8e227a6c4549340eabdcdbafc1d54d4dd1bde525. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:29Z), 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/QZES82527135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10423e5761249fdca694fab46e4f871b579e792d142720593cd3b562d8886af5. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-22T00:31:10Z), 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/QZES82527136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47672e7b1a80f763c4ac71e3ef3f283bef812f152d92529bf06394fb6f8e5cac. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES82527138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbcfe35cdf2c139443e05b4ed017c71f6725f6d90b90e735398ec2d2bffa849. 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/QZES82527139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad63046b07e3fca50ecf089e1c202dcca4f1c81a8ecf80743b7cb20eb69f7071. 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/QZK6P2533995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f00483b364d061b8c9a43279c17c2ba0d632dac0e2c732420aea5d115862eef. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:33:56Z), 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/QZTB32545190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7e54606c0d4a4829143673ec9ccf645f0967eafd2daf433f121fb11c40c166. 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/QT3F42553715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36483ac34327370906344a0fa7b938f3fa619d12156bd236713f7c56fdd9040. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QT3F42553716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd613de59e7adf74dd5dbb7d920e2bef32d6609845becb6c2559e7d9929d2e964. 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/QT6E52530972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba770e6560fc407beced5ff2427fdc9d309742af90b3f4fc94230e8098f00fe8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QT6E52530973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2355cd7db53c8e8bceb227ad1aa4baab6c8776c05e09c558ad287d2e75fdfbf9. 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/QT6E52530974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1cf18f51bab340d86d0c3b60fdb7a24f703416cc5a9deffbfa83c1f3cb99ab. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3FA2573851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642083baed22dba5790c041135552c306537069ae60ab0e9a1d4bb8fb55aa2a5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3FA2573852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff7d5df5d88d4a7b9969f84e2f2c42777900ab8f1b4ae4f328b3320a2050192. 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/QT3FA2573855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ca6b31260d9060e49507c64bb2966f230f8f7a43f07589a9563f0352ca7508. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT3FA2573857.