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 0xdf47b930bc13e8fab0881168d1a5c127c8af83e88ce1bfb30f8068283a7100e2. 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/7f567e28-ad4e-466a-95d9-6aef585bf16f.json and https://artists.proofprofile.net/proofs/artist/7f567e28-ad4e-466a-95d9-6aef585bf16f.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 0x88c8bcd89bee7f806957e5c1067d9ec48f788313e052b31a857acd0c9a0b40d0. 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/GB8KE2421612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be6b56dfef336c103b094150e3659f5ae5e6d107f19d4a3b9efee26dd084d83. 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/QZTVM2418611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620ec49fe63d96bb1f6e05f5a6e10e5fdfe6df95ec5e03d0bc3fb6c6a5433d12. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZTVM2422985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66b8d11c6248f5f88bf73989a2cbc38f41cb60ae36cca5b5ec6f0374490dbf7. 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/GB8KE2415597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed38c28fb33b61183da54a7d72f9a131ddd43cbc26cb07cd85cc11b712e7abfd. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/RUAGT2410666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec9bc78e543aa395f7ad897231a92a042063d903b13a52555804a94b7e9d075. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GB8KE2413409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2c1ee1786207203634050a177b00644242e9b6e593eab83942ec94774d6e54. 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/QZNJX2457026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4787f0ab8ba9792685ba885fdb768f7144a75731b27be328f77a675d4842e70c. 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/GB8KE2410183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27bcb466369625f0a421daa7f5d167c5e3d7491564162139b32fb6852507268. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FRX452485751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b21b07cd580629af9787f2e4ae1334430d1657eeab6cec7775b89adc9003d3e. 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/QZMZ92459905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79441c950c9b7b4c32d3737c0ca5feb70e6f5d95aeced21cd631ee65352e948b. 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/GB8KE2407986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b1c7929ace7dc995df584f9d21180cd9ecbd94711dabc78019218db3ac5d02. 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/GB8KE2404948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4b59057d0400af8c5732f2848ed098c3038068694a9f402d2f27365d99e0e4. 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/GB8KE2403853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be435291d7f6919e5dc911ef99dc261f15c4a6d3dc5823e810456ed83a1aed7. 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/QZ5AB2422997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e160e2af29cf881a744d944f0b1c97141c3212c2d07bd8862207ef448baf73. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GB8KE2402230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0443b61a39f0b3bcaa236fdab8ef6c699937671d79b67d0c3692e39823e74082. 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/GBLV62318557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40dc0a576be52394fc9128e16d6935dc762058c0ab6004be6da7e983067f9ef. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/US7VG2440145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49744398593a7a4202dd5cabdfa6ab9b916b2e04cabb5d9dc87c1eccade42d5. 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/GB8KE2400269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccdd6119deaca81d9e4644b96b4c9b0d754dd3df7e6a819377c0b9efc21da6d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/RUAGT2349857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b95254c38c11e854fc7b3b433f9d0ab13c97e724ef0ff8e935661bcda5487cb. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DGA0P2303605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f0bafc734b01c46679c7523652b2983601962fce525a3f62a8a936a2379d80. 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/GBKQU2381602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724765bfdef19fcab4687e6e2285bc4c1eb15f352460afaeeb3cebdb1360999b. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DGA0M2303212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d95f0e5a063ca872264f5fd8d23203a0055eec85bd98d5c96fcf7856e741d0a. 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/GBKQU2362894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f4be124fc80917411b85c8fffff20f3f277dbc3197c0434d5587e2ef24215b. 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/GB8KE2316421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e6b2de0968443457bb43db2b17f03f8dbce7fef39310d4eb02f23eb0181d3d. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DGA072384263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a172bd1269b83ec0f5a9b139b4a65b65d222f8c5eb1af0c1704ae798699c7ec. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DGA062369494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a11fcd2265d278d5008266042b546422e74b64135994c29a9deffaa2bd85f9. 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/DGA062341230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc374dcab51a5ae07fe7d2f9fa6a5ed0ccc03e8fe3af1969a1f69eacdb8cf4cc7. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DGA062301546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de882ef55c76397aff7409dd6488d01c94f1f84dc61551a904836baa5b3e669. 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/DGA052338809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e55fed4a34efa14dc051df3aa6fb45d2d3883337a75263fe1463ae95a2f756. 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/RUA1D2351625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e7b8167bc2b5e1c9a388db54ed66a92d0a2e9b589232f9c0682b123342b3cb. 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/FRX202378226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d083132387ba3c1945289391fca350f6ea2db9520ecadae2d7a7cfca9cc0af. Chain 2 (Bitcoin): anchored in block 956995 (2026-07-07T04:27:57Z), 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/RUA1D2319181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4515b0287e7d713e9ab327c757e7f16b39f4b5106da8419ae899ffc1e31cff. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/RUA1D2301640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf04231bbf379a208bb15b8ac6868176ede9979ca36e753c1a3597b02c3985f6. 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/DGA092209541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa252d7c9822c8f35bd47c056e976809ebbc24e53ddee140103d92ffb15653a4. 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/RUAGT2215358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56417ac935171a9d4fc6de54a4d6f6b5e9ba3c933bc952e85f91f62ce2ec2b94. 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/RUAGT2207752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd797fc98492636b41b2a30cd83501134e2a1e737e2763131ee8c17cf042aa5d1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FRX872240998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7339487f9daaa969b1896b23d67524e378c957b7eaddc11933f96865d39d72b. 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/RUA1D2284524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad696be9aa50b429df50a73c3d8e1c8fe928526bd7148e5357bfdb32f877205. 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/FRX762291982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e2163921b9e13268370f2be4bf558c723fac56392f36a94e325521d99d74d2. 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/GB8KE2209823.