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 0x529aa51d48ffdda553a3d6d06d58363137bb0e2879214e84375e4cc3546ef3fd. 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/ea9f7e5e-8d12-491d-b7c6-4deadef00cd8.json and https://artists.proofprofile.net/proofs/artist/ea9f7e5e-8d12-491d-b7c6-4deadef00cd8.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 0xc440d7d74493eb646655387802dd1120bdf1ae7967d6e5bb36217b8f0d0b12fc. 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/NLP421600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b50a48ea3c5a0c83a70ce32ab0d13321d29cfe94f9bd31a2ce7dfe036d5241. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/NLP421600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150a72612bd04e0ce53e46a594f661faa2faeb355cf363ea1d3c51a2fa2ad5af. 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/NLA6A1900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ef2d2da224405ed565a5df27c21e6cb8cba35c3ce08e467a03f2e2666a181a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:57:27Z), 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/NLA6A2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba75073bd89ae3b500249e8855ae23867f506012f55bfb2fb58da1b2b3df070. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:36:25Z), 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/NLA6A2100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ef2d2da224405ed565a5df27c21e6cb8cba35c3ce08e467a03f2e2666a181a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NLA6A2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a00c867da17e515b53559b26a4fc177fe57f0eb18e012f116c695ff7b36ba72. 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/NLA6A2100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac435323cd8f6ed47ef4b87fc660defe343b42a3096710c717355c492e597a4. 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/NLA6A2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1a054540763122af864edc0db9b52f62d72e236673e63b33f2eff1b85b6669. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/NLA6A2100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d38ad7410dd0fc56134a53b11651480af3d130821e4f853c5d63138c2d334b. 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/NLA6A2000152.