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 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 0x5851c9bb791e4ebe68c44d8ccf0aff22d060b6773c3ad61077da6bb93caf9d0d. 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/263b310a-54e9-4325-ab93-1e24954ae792.json and https://artists.proofprofile.net/proofs/artist/263b310a-54e9-4325-ab93-1e24954ae792.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 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 0x41568bd4ee7464faee1e0365c6ba74d5362dcd76441d9bd5b61f647cf8acdc3e. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/QZTB32363020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0117d18ec7057b58076981090593aacd28bfdf4a29b1a7b3cb1958a5085b330. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZTB32382220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0fb9f215310b2d503d5e221bd26f8727d5973a1766aad617f31e59b5473106. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFL2365173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036592dab52416b0c098f36d0700694871b4b23c62bf2f3ac8eede9e828a7ae6. 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/QZDA52447199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac32b743b9ecfe7c68d1e71c769edc2c74d4d58e4baffbc76752bed958fed737. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFZ32435081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395a557f4d254e8cfd0dfdc135ea319ab15c2069d83ce50a280f2b5b55ed0c0b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:18:52Z), 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/QZTAY2359368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc912a7be5941061c86d68dca981d2b0979cd43e287202a15e11b8e52d4ef6ecf. 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/QZK6P2451479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f7c977a5c8b1c28445a5f41bc83ae569ad6e3d327bf16757d33d8dc3702986. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:41:38Z), 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/QZTAU2479503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ae95308a4753fd5dc80847b0893ecc0c82fb9d0bdfca9b6e1b09e9eb610e61. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZMEQ2485268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0117d18ec7057b58076981090593aacd28bfdf4a29b1a7b3cb1958a5085b330. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTB32382220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2603d8ecf56d3e4d02b2ecb27014f8cfa9a943f52b8a7b258eba478628ca9b21. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTB52310989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88c5bb32bf2c6ffcb8583067b8873aa7186f97a5c9fbec9932f1bb6365e2b50. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZFZ72449588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfeb0602f0357f98d8ea97f7b1ff1556f3c41c44fef58d283d5e9a7d382fb6c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZNWR2484070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0e741f7334f98528fbcb1a8213b5f2ed2c7dae94afe2cf9c36d64cd7d241ec. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:24:12Z), 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/QZHN82458467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245ac32b939e3143cbd27a3996639ef09380e7c77ac67e31613f9fae63fe76df. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:39:18Z), 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/QZFZ42540870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16defba32fb1ecd54949220f8e600a5408ef3370b19b5fe730bb9a2cf991401e. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZFZ42543577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31539b4be71af7317e6c7ebeda992fa7cafc62c546822bd40e24009c267d8e06. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:00:04Z), 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/QZK6G2404198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bae41549c7279e1b1bb29d7d0c01bb600fa66df1e39fe38ee913d7d4fbbbcfc. 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/QZK6H2461708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d403d516b00ab93e084a54fd22d551fed61a35d135bb3490296c5594e2ecf9a. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNWS2339518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bee4593b6ca32828fd64c89017d0dd3b21e7e91d0242d077b506f8126dc820c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN92418465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a7fe56da2f50d65e2749928dce18d7784b5ee3cd6872e1f2dfb0a1b3ab6ab0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:50:13Z), 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/QZMER2514908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb200c47b070cb67f20604acd744187ab846594a42a825eda6f096920b19cd895. 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/QZMEQ2565644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981a29b7ea2618c1688efbe07b4770655d4be36edfd8e47f31c7f230de45d54e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWY2375374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8873393fd4fa4e862f01e0053bd11d41eaeffc86d8feffa931b220b025f18c6. 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/QZTB32382219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41835590e2ff21ffd065273111853f4e6fa90bffa1db130013f32d83000dbb8f. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZK6G2435267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d5b98c2ed27b7959b4fd441d073bade7cddae7fadfaed4cb4175b019da24bf. 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/QZK6G2435268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7196c3158c810311f4f0785d81815341e79223e5f3a8c5734ec990cd327e24. 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/QZK6G2435263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a0916da7c8025cc8c0f29948ba323724d5343ae5414d61c1fdb6c4e1c0cf33. 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/QZFZ22445380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb6276a93286df5ae4255b24753b9b256e99f32d3263ae13ced39ef89c05ce3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWT2592929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59eaffe8a67c8a409bbaf45b9183ba3116ad3a2eb8e2d359764cb4023db8ff63. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZTAY2412033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59ece065f8fdec729637f1d940b0989a143d4f30dea07892481f32337c207d8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZRP42442498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32190ac3f51498e3ea5736ca3717d116b78c0779806dd5a5ed491d77cba3565d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNWT2547106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec4ba7c0ce76e765935ddd54daf5c12d48a2ff720ae56cd2a376db6302bcdf8. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZK6H2431134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc184cf29ae1ae1d62d344e730d0103078f3cd80253ebf3410f7023a50b5622. 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/QZFYZ2478340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52cc520495f15f0c2db237c025c7fb58fb9c7db8d2a45b5515c2939fb99ffda. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZK6H2539705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef7ecdeee6dcbebbbcc511f6e04bbfaa497362738e729988c6547eff5e21ac9. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZNWR2551707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3806e7b3b43d59acbede9f7ba9389c09f84c34b3df67079ca5f8815c7448178. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZK6H2442597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ad5e59e45c46021c355ce9f295f78dfacf0268b427a85a6334063089e3224b. 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/QZMER2590746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52c3dc37fee1cdcee783b602742d83a403286c00604fe75a79e3c8809a08841. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZES62591183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3279eebd9e5fd18ce38957af8f0d79586df0967c811ce447bdacab6bd78601ae. 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/QZES62597146.