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 0x23c4ed6ee2fec8e1bd75806826409c33fcf9a07a6e4c22a2da980279133b89a9. 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/a6cff18b-00c9-478f-8f63-b67aa58a8ea5.json and https://artists.proofprofile.net/proofs/artist/a6cff18b-00c9-478f-8f63-b67aa58a8ea5.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 0xafb6bb714f2d60043e5ab939a82a878ae91b3feed08427687c0d2a77d66eb978. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHN92118958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12db8f98778b8e421241549962f2c43dd402a0f9319b1fea2935ed6815d4f5d6. 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/QZHN92118963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7339e0fe9cabc8563aaddc6119487e31853a7dc3707d4f30deb522fa747014d. 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/QZNWV2143032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05162f1fe06db673d470570ef6cdeb2207b24cfd50e213b770bacdf5b912c2dc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWV2141137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd056bfa81e2691221f8982a488ae521f8079c6b71dfd3f35979a52cfb23fa1ed. 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/QZNWV2141138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611eaffcd436cc16c92b4bbfdcf9277a50c5515500e63f5dc8df2e6f5fffb0d3. 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/QZDA42202944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5b04b5535386e182e652d3c696c16ed11acdf4d67f5f542a83ed1f7977ecdf. 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/QZDA52244679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fe8e533be77d955c64cee53a71b081b101b3b48ba40fa764eb60aac7458aeb. 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/QZHN32250888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f10973b41f2d2025a7efd18739b34e4e84d92fe0ec8ecfcc6b2c1f87052d9c7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWV2266468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c2f8d779095cef70e1ca35ae05482e765f82795292e10d623762cf9a7e4b58. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWV2227149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5530bfbc1db3dcee3898095b9963809f79a8ee6c579c0379b79decf97ecc23e. 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/QZNWV2265645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbd955d2add1ffed081468372831a7863c3224071830100589d09a2d5320d93. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWW2239525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe354a3c1f1793e5278f3668fafec131745e704619de6e6cfba2a2fde056e58cb. 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/QZNWW2239527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb883e39de3369d54572173a126b186c235ca137e63a587947bf482e6732f92cb. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTAT2237215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb0ff46d7cab20d079cf8b2b608cc44f3cd431f8af175296aed789525dfed1c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB42249409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e52c5a815375251e8ec2c915f1549006561567278076ef4bfa3583e4216686. 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/QZTB52213610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9a5103ef22b3be191ed4f6a4750c82e37f32d3a1afa7d6fb5ad450d52d246c. 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/QZTB52379668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d9a1225247027f066b90d4cc03beaff8a7ceae7f3f727601289aaee6e60bbd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTB52379669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f5c35ae5bba5cdd9bf4e5d8f4601cd65413c9ded511c260be06a347fe49d39. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:50:54Z), 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/QZFZ62437561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a32b8ee44fc3f99e8f2b93064d547727d556aeba622a84c7cd99918b18bbfa. 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/QZTAS2428630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b4e678bcfa2af5ebcc24e78de7246bc45895034338c94e1133d2bddb45248a. 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/QZTAS2428633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb980d29a33e2bc1a61cea0f32c9e9f83495549e442e88d1f4590c1e05ba8a9f3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTAS2428634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04941850c53027e01e34d3e7904c6a958238604ce55956e107d54a4aff3ecad3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAS2428635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bb924d70d9167b2fa84a0a174553d0b215303209662a4c636ed7a76afe28db. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:32Z), 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/QZZ7L2496675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10c841bfbe4744db687c5de162379075900e7e5f6d4a3604210b4ce606f5042. 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/QZZ7L2496676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e71c13cd8742034f80a31480ef2aa30d1b38f51bcd4dca0b5c0c2df2ba8ffe. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7L2496677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf230568d366c9fd7184faaee406057e3d575dc2e6d3b379939277dd8a42138. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7L2496683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fca2c107a6364ba801f28318d7a9c3711d94bf2e6cf3a80c177efe55781ef7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZES82539144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7420a2cc82e92d0e8cbb19af9e5a1e3e5b44a96baa4af66a0a84f994768070. 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/QZES82539146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b35c954a73664fe7dc958eac855007282e7f01d315be470ead32caf309e817b. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZES82539147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777a94e734669879786726ace9fe91a16ec2a09bec6f61412883073b008c34fa. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:50:10Z), 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/QZES82539148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc106dd97f5876a32a96be968c0bf89206aa10d641a56bbce09781f35dc343bdc. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:35:14Z), 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/QZRP52596930.