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 0x1e3c2e80c0aec3669e575958cb672e35691611f813dc5b4164f3fd83bb6167ca. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8a3c4bc-cc3d-45ee-a51d-b2d62eb08de1.json and https://artists.proofprofile.net/proofs/artist/a8a3c4bc-cc3d-45ee-a51d-b2d62eb08de1.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 0xbf10c9ed89e369ea446b359da90f7ad84e30ce6b7a2e9546e726efcf88bd37e3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:27:37Z), 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/QZPLR2294636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed165d8f03e6998f7fe6d899cae3d186df6a26c5e427b3a762b014853210c08. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:06:45Z), 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/QZK6N2246057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444d0a53768ec1eacfad2735f700d15c411b207dedf6657a0dab7e0edd14c9bd. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:22:51Z), 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/QZK6N2246067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d32efc14f955054c911822ed59ee79acf7d164542731549cb520ad12e4c158. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:34:45Z), 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/QZNWS2258322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213b802a404dced8c0d728d76aa29cf6cf70375737bb91967fcce8c9b72f030f. 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/QZTAW2242386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271cf6df6d669db693a26ae435193c6ee98c03b244c71416e286e96ac31896be. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:45:40Z), 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/QZTAW2242387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5261df062311666dfc1c69be9ef51a00b985578b48bd6235ff90faa5711ec49b. 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/QZTAW2242388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2875b9e82ecf86bdc820f55b1437ccf70545f579e7c344ba67f34b4e661e94d. 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/QZTBD2305548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8a792ffe5508257064b9779390c33d59fdc54049b097636f25ce456eea5f9b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7X2492412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8a792ffe5508257064b9779390c33d59fdc54049b097636f25ce456eea5f9b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ7X2492412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b178b8584a59db5c948300aa468a20547135918efdda796b2148b7a498881b. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZZ7X2492415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e732d93ed538e1bb4287040de7cdc5fa3d33df9013ccf4d1fb16f8da024964. 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/QZZ7X2492420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283fa576ac743e95534244dfdcf634c0d68e8694a944e88d11a0f03a2546d84f. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZFZ72515618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8704aab3b7bd75900d68f3cb215f044e1ee130dad976807289e83ed2332ff1f2. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZMER2546567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e47b453b815d672d59eeb92b846bbac724bcb7ef68a6dd8a8f677e2496a99e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZMER2546568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ac60bc4eaa7ecd2bf8eda542422094a71189685a2362cf2b6c1831c6259395. 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/QZMER2546572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8aad1f05b21ce4146a6d4d2f3e4187b3ebb7868c6a3d6725cf290494863ae5. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFM2516156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ce027db1a5180ddaf781e69a6202dd9b88f87f5abe68de63338321f46f84e8. 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/QZWFE2439634.