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 0x32b701bd4c4c518a4512a7f44a17b5bdfb070aa31384fb00db3566b254cba9f0. 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/08098215-9eda-4a49-8fe9-06f084021a8e.json and https://artists.proofprofile.net/proofs/artist/08098215-9eda-4a49-8fe9-06f084021a8e.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 0xea9631cd3d4f6965e03f19d383c22711127180608d96a0515ecd623b69a61bbb. 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/SE6722302201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf9c183307f00274c90488fdd87b5b3c11f15400ccff9425312e0977606e583. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/SE6722200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99baf26cb7b6ffb57f7684e8504f945bd43f203713e52790d7e853f85bcf6b4b. 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/SE6722200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae3ed2078f471f5fa063edef7a907889505fa3747855e9bdb1087975c8e981a. 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/SE6722200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a0d65695093e8dc245a6e52543d5899453f81b941a6486749a7a0f88e61be6. 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/SE6722200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37da7e4965ccec3e09dc62ddba0c4d6fc7ee7f63cac96824f2c1377d4ac72748. 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/SE6722200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d0ab51cd342a508b39c2d7f80e87acf32cee3047b11070ebdf76c39ecb687b. 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/SEVVF2009901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749b298b899b76821677fadc76396cb2f072f9d58622d9eccb50f250d70356fb. 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/SEVVF2009902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ac4cdc06e621754f00fb4586b42006ff5859adc236be0c7568c6f848ba0188. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/SEVVF2009904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1816bd057b7c3b0c589e53881d5eb9a93940dbea0fa7793ba52a0071914b267f. 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/SEVVF1902302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37976694d1e5d129d5d61b987316371658027c11870c786a17398b83942cd0e. 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/SEVVF1902304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32889ad04fc00e81d64ad0537db2d5ed97787d72e039d8132a36df2a4529107d. 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/SEVVF1902305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbb1b01338dc1cac86a48f313fe16063bfff37ebec9de494bc3ec5a1ad7002b. 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/SEVVF1803702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82a68c1a039b8d704202980317edd8ba9535b2e68b1dac7d4d6864669eaaa37. 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/SEVVF1803703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359a848fd7006089b5ee0ceef72e6d532f50d34b984ca917f9a7e9f14ccedfeb. 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/SEVVF1803704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7ca10e2b212b005860fd39077a82945b9c20aa92603d88801e56da85e7fa29. 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/SEVVF1803706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1411b703337c513ebf8a152f17a36e2214f99eeb4540f211794a980e2492b7c1. 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/SEVVF1803708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1594cf0b70a47a6a604e63a200a87595740bda5f951761e32174563bb19e314b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:24:04Z), 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/SEVVF1803709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d7eb5b0651186aed17aada37f51f64514f19a6829008727cfc939b94fd9857. 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/SEVVF1803501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606613590306a7cf347de2b42176e3695c9d81c6e58c5fe40985a793246667e1. 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/SEVVF1803502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176c54315a740809e640a138e671e2ae45fb1a9384a5196c54584e2b55b0b3a7. 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/SEVVF1803503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502feef5eebce288ed8abca1134f5e5e6e193c15d2bde9ffdd65240a76cdc61c. 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/SEVVF1803504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73605003153199b0e478a76e41d766262f233cecfe8ae4b7b7dc144d0247b717. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SEVVF1803507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c26ddbf1606cd87e15b9d70f996ebe0be34c3ef0a21a68d8ee29b9e3e46e3fa. 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/SEVVF1803510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11274461b0ea1e4a8c529c3097146a9cbc8d258dc1d223b9614f65bac9607c87. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/SEVVF1803511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e31f3cc369e6e5ddd64d0228dc2ada8e9888fd955f7d0eed1aadd90d971361. 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/UKCVA1902632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe969d8ff390761896a345d850736fe6511ee91ddedd9ab6802c4090519513d11. 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/UKCVA1902633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7e50ec329532250753d04e6525edb5323e5641ad7e41d69c91823b6feb0083. 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/UKCVA1902634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252f00681c46a23f6e5252f000ed60891a07a7b48f56336a7958062f97331e6b. 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/UKCVA1902635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84811a85cfb2169eb2fb4e229919175463fa5a663e56355635f26a7aba4e59bb. 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/UKCVA1902636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfcae75c817613cd257540794b374733871cf0d533365ff72c1f07eb7d26a92. 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/UKCVA1902637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b368cb410bb14cff1859bb5a2790002c25defc873ebf7dbc0cc086c8cb4573. 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/UKCVA1902638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ab1b48e0ddcdbb9a74df2f540a7b2b295094806999bd9c1ea4e1e29f682e15. 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/UKCVA1902639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e9ed540b8c0a4fd1d7460940903dcbe8e00dc3b529394ad33a766689bee378. 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/UKCVA1902640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7948ce48465c361ffadc082fc68b36ab48e45fe555612473aa3b22c715914126. 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/UKCVA1805381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11886227d570e32645be3b37165ac4e39c255f08f258302777873ad7423f4b1. 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/UKCVA1805383.
Nordvisor: Ett samlingsverk från Nordvis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc573bfb61ce4253d91cb3019d9050013f3b973dcc4c7a972dbf9d2a3d52bf64d. 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/SE6722300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb482d51b2ca3fe3bab7ca5622960b6ea6f484a1ea18e0314c62c4bf6b1439db6. 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/SE6722300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd42b13d54fe35b020b3f7d94beb409d7fe2105599fea111fa94283be0f4e0b. 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/SE6722300215.