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 0x928d0f117873bc1f7e6c3b9ba5d4cd78ff48146915f17c3f5a23c6c4b1ba3b75. 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/526d6fc4-2eec-4e06-b537-3f336b50b6d8.json and https://artists.proofprofile.net/proofs/artist/526d6fc4-2eec-4e06-b537-3f336b50b6d8.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 0x4ccaad55b6dac35fc398a48d39b2f6e397ddabd25157b8939ba369282bfa5911. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM91870608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4a10000a07082ac9613f7ddb1e8427b67ce3fde7eaaca819b8fe41db28edee. 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/USHM91870609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238e86214acee988f02ab5eea70dd03182996d3c03b9fb0da2917f1ac61b47e7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN42145519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b530eb04c6eb184d8bc93cc805b3777525939023b000fea241feebe9d26b20c. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZHN42146172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc523c2f5897cbd4c1d83654462d2e496c4d9488b051c816958472c66de551326. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GX3Q92107064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be64a2ef261a9d72c7f5a6ab4b124e49d940ae1097b060b702407707bf53482. 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/GX3Q92107068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3410ff080b86a434d3aeefa6b25b497f258f0523eaed5a394aeb8d28d59975. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:57:42Z), 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/GX3Q92107094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620dc4f6a5157ded343ca5ca9da173e1f410f5b738e211ab4bf4efcc901ee837. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:06:09Z), 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/GX53U2022793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474caa04488c6dd7d2c1ec717d13359521052bdf9928c978d69c6f2d03669ebc. 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/QZHN42240058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6674ce499426cdae8947920939ff501636543aa429b23806155c8a84884df3b. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZNWS2315879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8914be0fd4aaa79ebed8742b4d4ff7ad748ebeadae32eebb3e378681b38f54b0. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZNWS2315880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa49723302dd964ab96551d91eaf301cb6daf7b864ebbfde04d8e36be35fd287. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWS2315883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224ff7b90a513ccb0d4d40967c2d288d688f1bbe56b93a4f1f2235f16129190f. 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/QZTBD2477582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda95a35361bba9f73222ff5142b0bb9443bce64a3b0270c6cd9160e7996864d7. 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/QZZ7Q2402476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363fb1ccd558cfb48386594e2af867ae31a0603bdc5a0292dfaa8783ee9b9a7f. 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/QZZ7Q2402477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af98db1bdcd1a973399652e97e354b6f1257a3fbf8733aa0698a384c9baa24d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7Q2402479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadba4c6b68ff599d4884faaeb0541da4460fe6fd5c1160fb9501c77811844035. 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/QZZ7Q2402480.