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 0x3e9c5f39792e81225ffe25b759840a94892243db5ed0d00ec22699507c658d61. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3af65d9-2d39-47e8-9d24-ea6efee07fbb.json and https://artists.proofprofile.net/proofs/artist/d3af65d9-2d39-47e8-9d24-ea6efee07fbb.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 0x68c7aaa959d4937ded9257bc396f2fbb8bc207c162e5762bb9a07f3d4590012c. 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/TCAFA2048729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0721d99196f653f05a1cfe36a6465af34ea3eeb2f55ea79f0f39b4b73eed9263. 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/TCAFA2048735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c30712479d525e494825cdc3a4cabac887c43b239c933d4355c212a94cc7bef. 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/TCAFA2048738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7955246ea00473360e929173813d76773825525410f7ca02941d81b2e70071b. 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/TCAFA2048739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794c4591f6e255b7386c675a1f5e44325cde006fecc6aae95a01a1a4a94e3947. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAFA2048740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e085f57ab64baaa3ffb323c341e4b55dd69513b310abf5b4a004068efac5cc. 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/TCAFA2048742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b72f3368ea9c292abdb4ee11619f17088ce969ed2266f7fd4774de0950a398. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAFA2048749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522db172b8f618b35442b354008cfe9b0672f165b555e928b0345263cc6d9ce6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWR2100822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105105f201f23ee8731c135338388e765298d43256c74ba4f8cdd31c2636be2a. 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/QZNWR2100823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6ca6cb1ceb8fd1d548ad5ccab8ea808af1beba8256ca7ed4e8bee1513efd83. 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/QZNWR2100824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d303cc24acd824b5eb5037a32f416d10324f59943c054722d0f8ab92bcf5a92. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWR2100825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671ad3041d36808263c3c0af7d28453c59763824885cac30e514c21c28729246. 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/QZNWR2100829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74991bbad544e46b6ba47b18dd5dbc6932a87a4849336c43daa2936992c33380. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T17:37:25Z), 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/QZNWR2100826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105105f201f23ee8731c135338388e765298d43256c74ba4f8cdd31c2636be2a. 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/QZNWR2100823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ae54151a4b946985cb7ef0504c4b3d1c4252e21f4e40ca7e9c29fd940e64de. 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/QZFZ21987893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41c9068bfd0114b7786d7fa0648e7c08eed529cdb569ab09f88257916140ca0. 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/QZFZ21987894.