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 0x25ff833a9e12d0cca54f1a93a6dd4a2add45ad007257bdb98d403255f5e3be80. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8143827b-08ef-4f7e-b5f6-f0f03b1b53a7.json and https://artists.proofprofile.net/proofs/artist/8143827b-08ef-4f7e-b5f6-f0f03b1b53a7.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 0x8be18ee03e022b6126e644538c5ef03b909dc6c70bee76d0bd56dbd08a8f61e6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAIJ2421037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8d36f575cf8eb4b1740b0ef3ac59e085e67106a68b6b0d600df4ef70fc4280. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAII2421042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae4e43d6b75aece7e6f3a5aaaea634138ec14dd0a392b67f60a7b87e2597493. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAII2421048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3907749503f495bff5d0a8f3fbc8862527cd0c2ed84fa0e81ce7d9dd1226eee4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAII2421052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e5e236692f181493dfe20a27833fe378175b9a986aca8b433231d70105700c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAIJ2421057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685c7bca8c60766be3de13c6a96681749555eb3dfcf6edf2ad72f85db674c329. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAII2421063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f59fd990a5294688c03f2ca57bedecc57b050e627f4fd3c83e7f2ff6fc97af. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/TCAII2421072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9697431821af519f8ca7253b49f228886be0c3444402ad256775073c3364ef8. 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/TCAIJ2421077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbd1bd9022a128e4eece7ea894e325dfcac2eb2c356cba4b48a015e84adce4e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAIJ2421082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173913515e962768ddc76474668ae01d82f9f7c1c502cbdc4648c1ab8ca18cf9. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAII2421087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d20d410add43400388131f73313ccc07c0ff03893da0fd692db26370df224f. 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/TCAIJ2421101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4cc19790291f88c7606f0d5e822001e3e473e8caa1644da537dbcf6278fad9. 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/TCAII2421108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc7b6a97458fafa8d72beb8144939e64b88ded17ddb295a55440b2f29292b69. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCAIJ2421117.