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 0xae7e9cfa6f0f7421e57ffe82546c170b8ec1919c4e4d8cc4d08b9aa07b78dd48. 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/54e25b91-f1aa-4fb9-8e75-cb7570bc4781.json and https://artists.proofprofile.net/proofs/artist/54e25b91-f1aa-4fb9-8e75-cb7570bc4781.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 0xed1c3be8a30d8adf50e44339c31b7d5c5438f0ca269977fc3a35b47fafa21b72. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN42292428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a35e89246b350adba6a7926c1887f9613ba0a48f3c2233e089787b161281bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFE2462325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1b3d3e3eab3aeea52b6db745a69f6a36fb01568905b202a0b1c01b5184bbc6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZPLS2464354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0864b41407016f0f0b5945a532b6d124f6c922edaeac178c7d34410e80f7975. 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/QZK6J2439047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d09dec35902ba87b93c6da1ec14ed198e11c4d7d6db6dad1934b614e954974. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA52447067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e06b452678a5590675bd0bfa6244fb890a2adf98bd7796fe6b3630c1780c483. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTBF2371679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8da1c2ea560f27c9ec099b9a1da565178a616ae33e1ac3024f00f50c059562. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZRP42394908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a1c6ae78849db0d24f2c0caf3007f973e57444ecf770ff9a5b7c8ba1c25714. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6M2336960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29215fd05cc6c2085d4d1534de7044f71a2dfe30527448f11077e7afed47275. 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/QZHNA2341425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b0ac75cf8363ff8c547d6a8b0947a7e75592b4f74ad3e075bfcee7e44a9bd4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFYY2324850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb426da9de2bb7bb93def70688b37a38b6c264e03c5a29df415246768b7763733. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWY2261711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106b8b19497c81fdaf9b7f11a0c8090b4af72589acab45afe95a7553145bb128. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZK6N2298293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d5273f480f0b72e44e747fa377eeec5c29c3cc898f837dfe7255c19794e585. 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/QZFYX2216754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671548a04c50d508a8c8ff9979ec62c70ab74f416355638c374d7c2246a3a467. 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/QZNWQ2169853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8528b1eb34f89ac6484961fb22da40627de09a5de43ca83000af92697bae69e. 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/QZK6J2145899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad805c1bfbeb266dd11e5c89785006fcbc326e7d8b2af6d96ee12ed8b15beac. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZHN72139222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb13c740917a4862f45829eaa31166beef1ccc25a4c186037ecb0a3f0f825645. 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/QZDA82104676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c7a801da3c1587f92aaeded19456d27119ecda3243853f6630ce47f9b3f006. 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/QZHNA2094892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d7a9899ba5044af0b2aaffba93b05e60151e34b1ca9893524e913c27ac62f8. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZES82027034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed373573c36a7d669954034a3b9dc9670859652d26512cedea834892449b4efe. 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/QZFZ52027712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31c140ccd115771fe3e65abbc2779b42b078e5842d1b20a668e183be3e8f880. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZFYZ2090900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215d76ce0f3628bbc4eed241d77d9517c087dc6b7141b8f34d8b6911631a1f3a. 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/QZK6M1924705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95987a8b3e348294ddd0663bb3e3325fcdae4e396ae42fee5372e1b2d11e7903. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QM4TX2335166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713986a5edebe02c0e47e280a338df2aacbdf83f23bb79c40143fcdb7b4dd978. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QM4TX2335167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271b0500629c48fd554646ef0f7219172ce587b60f7e1e27546d0c2eb2fd88aa. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/QM4TX2335168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562e09d984666730bef2abad8b6fb39dc52d939c4c80d9a27c2c75d3b4fe15d5. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QM4TX2335170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36474ead9d7279374661a4e98d8fc31984b05e64e6defbaa19e083fa7b044b98. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QM4TX2335171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e36e883c651dcf7cbee97dbb1ac9f445b9974c0a4c45a0d7a0d5554ed8232bb. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QM4TX2335262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185b14def6788f8ed4a0a2436c589e5d1e1397a6d795e2337784182bb6f0887b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QM4TX2335174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9811f04aafd9450c11b97c9d5e501dfaa3bd420515a61ca91d9b19b796872b2e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZDA62410718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7478bcdd3210a37f9b376d676bb1216c6f001005e44520672f253e021aeead8b. 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/QZHN92284063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb604e7239a6130cec201b388d48d15dd7dd81b8263f195adde03a9f4f28c8b3f. 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/QZPLS2259169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9583dd9e93ab61736ed8bafdeb0c52f4a968e95a477cb3276f382670fa0a0a90. 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/QZK6M2256761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760d34480cad218f5cfbe068a3becdef44ba3f6bf558aaa114943f45f692509f. 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/QZFYY2360533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b55b2d2299380cb33034cb95d563618ffd7b5ddcd8ffe1e6ba55ab37682de5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ32525308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9fa332d212de53167e7783b6b4052d84eed72dccbeb82f7354016d4a64f886. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6Q2519832.