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 0xca2faa153289c1432b5d8680708572fd87ca8bd2fe0ba50d7e327b24bef33699. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb12532a-9443-4f5f-9185-558b20ec853c.json and https://artists.proofprofile.net/proofs/artist/fb12532a-9443-4f5f-9185-558b20ec853c.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 0x9af7515968685c6db234971ccb24caf2c27e13db117952725ea856e89d392753. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM9A91508099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04c43d26b26e5016b6619cefbe473aa0bb6437e3745c1bb0f8e9064d0547dc1. 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/QM9A91508105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131922e2c98bf296f5dc222e83cd8e9a12acc987a6c89b644f7da52af0a93d50. 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/QM9AA1855860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e92744e3732babeea65ed45219c5dde8aa1339957925e7e9a4f162df70652b1. 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/QM9AA1855864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde58c5be3eb3d662739ebba40b16d7e0dba6cd9889a1301fd272f81d8619758d. 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/QM9AA1855867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32e86c07d173db4ff3a4002d7239db22f29d28eeacf3f1c799f8c256abbdc85. 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/QM9AA1855869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4558f9c35f4d65c3b5adb3c49e4fb6d0f3bdd2b46e7cd45c1ef9f6b07868b845. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:01:10Z), 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/QM9AA1855870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8d344e47ffb62870831d1a4982ef73ddc4ead78848d004787bfcf3e453c138. 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/QM9AA1855873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1a4b4b2e3b84a04e6e074a4d4228a46ee29f8a85ed3db843b88f458d22c990. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:37Z), 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/USL4R1903489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9581945e3c34dfb5af65a202816c74540dce4e7f0f56f334f689ad7d8fa117. 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/USL4Q2180658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa406b666f9d65135bba3d70c2c138141a55f8e623733a26640d182b875306f6a. 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/QM9A92064345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41dbce9f8eb46c0a87feda8c06f019df61f7def991b018cdcb7da934ece4a8a. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QM9A92064348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960684d0c7597c0494c9b2ab86810b322505a3de5048a3fb705e9fb4e70e7018. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QM9A92064350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c44d919060e06e0eb0c2342b3af53cd2b2c51507de95d7c98e8f680108db64. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZPJ32317032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683338021134e1ebfafce1e8b6b0cc2b952f626e4aa8f73488131e9000648c8b. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZPJ32352048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c30a587a5e973ca545f9c9bbf7da5bb141bdf937cfce423476422edc183b531. 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/USHM92536901.