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 0x07c0234456797407c61570fc6df701db73b08a310e850aad4a404b79bfdbb290. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d34e3e5a-8535-4c60-a1c8-c26e737a662e.json and https://artists.proofprofile.net/proofs/artist/d34e3e5a-8535-4c60-a1c8-c26e737a662e.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 0x9e8afabf813f167b91e9a338531d36772f589f7fb23c7e7fb28e196b90fee2c3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZDA52292438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8ac8e3da8e47b1cdd0f76e1e36d8d15823c75c77bc61349021316850ba122c. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/FR10S2440230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec253fe34224077e461f1274d4a0e8f6d072addd523dfe951abfa8ea92eed39. 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/DGA052334093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5b7e97bd4cacf93cc5092c5c02544c826cec4c5ccb7fe54a214b97b5c6032e. 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/FR10S2445501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c1fbfab90de30467d05da90ee80e4397b033da409891a3c979283b68755420. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR10S2445502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8887b278c0a487b506dc810460f95c71862645a36bf2c61295a86b05f840f65c. 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/DGA082321379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91cb27a858b411ae5667a230e98ee7cd7d819c7fbf0d8fc6f3dc29e33049de8. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DGA0L2357883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572bcb97651289ff174f9ea39f99f256751a68a94d695ba2e111fbc70ada86a7. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/FR10S2445504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dc54179f256c99ae2eddafe01827eab2a13475929693e8131a2174c7dd0857. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR10S2445505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb30c93445f3003ef3523e9c9d26c05ad78f0a87ba2f6fa7251a32f75303f214. 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/DGA0R2346655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd318109c9a458375324f8144f2f34c04dd6e0b1130cab347de6ac591a2f0a43d. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FR10S2445506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e297ddc6c3ae5f00cb02fe7e290e824d9e582aa865c995fa468b6528b8cf91. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR10S2445507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb526a90f249e8c95e1ef1cf43e6a2380a4410a187b9706f59eacf4bf3c10a34. 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/FR10S2445508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e24165e52a63ab481ccd66cae8829f7f7e17f0b66d0e773f3b3810db4f7622. 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/DGA092394398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ab1255649e060f08c0002f2c79c7c735eb513772ec7574ab1f63c0c085d3d8. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FR10S2445509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11af7f7e0fd3c4d2476981ca8b8b1c160a12b9674bd83064e1fedd380fd4589. 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/QZHNA2114416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04c9ea9be31b14a21d8da55dc818e254e703d43c1c3d16e3ef081f339689026. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZHNA2114417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1178367af6be5f9d4dec5a1b5b4ff3360e5ff342a3855faa111f5ed667c1a1ed. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZHNA2114418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a64a6ca5062a5917d0f085ddfb83ed60f067c909de5e5b45a3101e1c9605589. 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/QZNWY2058977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675a2e3a4e054915c71b05806d8ebf6c62dd40a8ddb6b5b8de18a6484f8bf6b0. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZHNA2114419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd0f6ec78a412559df576ae4b26eaf08cd359cb6b3c9d723c6863cc6e3a4fda. 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/QZHNA2114421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc53d81679c81d5c319f6fb93e38198fa3e9bb71b48df92b9efe873d073998bd. 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/QZHNA2114422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f64c60fb49397f104b3c17e1a5049d28811d7a232f95734b34e88ad59a3645d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZFZ22029258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9002ee124eec2e55b67f69f1c592a759145b5642e5b0301dc1d426b678731b. 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/QZFZ22029259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d579931bd690d7a233d2e71d0234ef0c2612e637b9ec0f549c53feb8cca60ac. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZFZ22029262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3c6d1d242870f813aed103e186c837aef08135ed5619702e5776ed2d74789d. 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/QZFZ22029264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e6910fd46e4dfd9797db4155e4286036fef14a03c97f7e18e96383546d7b69. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZFZ22029265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d39a9c99dbe10adda6352dc7d94dfd4fba092003ff0d0c76cfdeb0e19334e59. 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/QZFZ22029266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd197d6bc76f244c4d87606cbe46077fa6cb7bfd3095bab2b9191cc8918d4b3e4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZFZ22029269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558e00a09f6e1e954a91f962052eb8c4f09c3a8bbab7f836340cbe532aa660f8. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DGA052449314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8ac8e3da8e47b1cdd0f76e1e36d8d15823c75c77bc61349021316850ba122c. 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/FR10S2440230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb30c93445f3003ef3523e9c9d26c05ad78f0a87ba2f6fa7251a32f75303f214. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DGA0R2346655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e24165e52a63ab481ccd66cae8829f7f7e17f0b66d0e773f3b3810db4f7622. 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/DGA092394398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8887b278c0a487b506dc810460f95c71862645a36bf2c61295a86b05f840f65c. 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/DGA082321379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4109db4ee9a23bef4c7426e8c9b8276b0dbc06ffe723f71e9e2616d1f1fefe60. 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/FRX762221211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47491b11b3c0abb7508bfaa21b0199bb35cf4242956b968145d7fa5c6c22603d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN42264150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dff9654733c19871fee3b90763920462771d1b65417c2c29661ccf238fe736. 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/QZES92219074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27e96f4cdf645f0b86b8a3c855de0fe815fb502d0210d90845df4a4b135d576. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/TCAFQ2183981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a64a6ca5062a5917d0f085ddfb83ed60f067c909de5e5b45a3101e1c9605589. 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/QZNWY2058977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35aa5eb6d107717e7b2abd6263d4290ade0b32cf918b9931ea014d38639343d4. 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/QZES72065457.