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 0xe2bbd7c3eda54a2ef63abc289d6641742d0b66771981e75ce3351bba9e6ee573. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43bff3d3-ffd1-4aae-8ae8-bba2d2089e23.json and https://artists.proofprofile.net/proofs/artist/43bff3d3-ffd1-4aae-8ae8-bba2d2089e23.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 0x9b084bb9190a3b79c901bc3166ded56992015d6e0208a8a42fde0877ee09ec9e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR9W11911411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd872ae8e9a49215b424c2072fda904f279b1af735d79da81c829013c4caeb3a7. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/FR9W12013409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a39eb89d54c47543f47d543d001981433fdec518b94c76904c1cd29a3f278d9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:22:05Z), 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/DGA072153904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1270805e2c7debef09bf1a50efe2020c26d0896457c5f270c2288c7018d7ce1f. 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/FRX762176077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc65fb28687dd52d2e96b303a5995df8865d755d66836593181ce61adfa6cb6. 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/FRX202289932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0df80f722f86d998e661eb894bb61ab0ddf9126aef3a8a0f1c3787dc445980. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR59R2328438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8483b96f93f11b048671e4937abf0f6846dc55d4947a4cdb663e2b6aa4176e13. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:32Z), 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/QZPLS2431047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7af73db31a8ba79d4621689cddd6e9fe2ccdd767577313e87d1643807ab30ab. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/RSA222190854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba941f19b69e1bc0a00091882f2a4a6a1c0169a933689590c8322b885442e8f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/RSA222190856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd071f17c451a7abbeb292af463721b19a150b3c92869117be1879c1d1d874d9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12431233.