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 0xd2cf6b1848ad13d9596850dd24e47aa16db0ecd765c3a96622c491042a167a09. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e4ad697-05e4-4e63-9598-0ca2a21dca85.json and https://artists.proofprofile.net/proofs/artist/2e4ad697-05e4-4e63-9598-0ca2a21dca85.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 0x477a48dd58db409506269d498d93369be8822c64d6acf1430d4bee6f12176ff4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLC8K1400372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe47525b009251bf6b0b0658204702b68ea5e00d9e52fb795ea1d729cb8d20a6. 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/NLC8K1400374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1880c292434e143b7580dbd1f992049167099a81ff41dc09cf9232e7d6603a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLC8K1400375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730a4d1df7e2f193f7a55ddf383b67ca1220e12049edbbac3ed8062cabafe954. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLC8K1400376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f449ad70609dd53ca8d0695e2b4f750518daa05b044461270210c00d21da4b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLC8K1400377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7e85075660b59888adea259be116c48a7b9abcb6a50d9f2a0bbe8a95048ddb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLC8K1400378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a8d3d3fd7a43db487801e5e0195d5b45f2bc4ae4b2e1cc487d23765b0d2d81. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NLC8K1400384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d84e62bc4892c30a0f4633c98eac09327398f4dbe251c1a4364e30e98ec4069. 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/NLC8K1400386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a91c9a6ff98621ca0a88dd9fe486fc764462950d3677ba793c0833a1f7e7f5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLC8K1400389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13deefdbcacd4d19f37bdbaaf48b7af0bf7ddc3d1dacb1792f9e06c2c4a233d7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLC8K1400392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c72ddefbcafa93c33c734ce008814c3802cca9af1497b6ca2b4c1bff3ca2ba. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLC8K1400395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1b871436c7bb85ab422b81fee2c86c191ce2fbe90bf3907957a2d541decdd9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLC8K1400399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30cf6512c2586d00b4de0dd572053090ad97ad8abc8ef3936a88fc537db65ca. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLC8K1400400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c1327844b99af57afe2184a2d781517e58ba058bc2985a7868dd335d45281b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLC8K1400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5065fe41bccf597b44934e51ef8f6fa0f567b8504914ed729ef9f27bf13aa17. 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/NLC8K1400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53990a64ce7bb092974b87a24c2c9a47b55bebbe017c60cd2eee56affdf3106f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:02Z), 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/NLC8K1400373.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7575b830035f999dcb2907982445f9a4b0b907d5ff2bad46218d38a56596c5e. 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/QZMEM2150553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f5384610d7225ea3e20d2a05db5029860e865a0100a901b46f120dce386d7f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEY472172013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cd26aeee539bab7a21c1945124dee3a9b6ebaa6336fd1fd6daf3d370157417. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEY472172014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0af6fdfaa1953187a6554e0cd9b24652ee19aa4d1268016ba0172e268079e73. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEY472172015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91ce23b0a750272f6e1e592d1d111121ea6eb134bf14f531bd72b85b893e6ab. 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/NLCK41082697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cb4a29151e8849e95a5dd6c2a44e67558f65fd3f20e411c888c067b97210ad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLCK41082704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7084d46fbb68347d3693160e458022d968215f0924fc30983cd3d9d8b1286f1. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/DEPI82309813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bc33bdfdbc599c787103b4e7013add3b2adb961ccd917c53a2bff5814f75f5. 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/DEPI82309810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b375448d3801db912c02f4d29b4e31e8e8c12ee3479c6407cf189fd81a5e3e8. 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/NLCK42212939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dda7f7ca6ae83101660c8ecf929b5720cb808b56ec058e161f5104a7258307. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLCK42212944.