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 0x7c5668033ee4fb4616fefa3f30c328e4250f7ab0c3a0032a2f8f202d3ee23480. 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/0f5f655c-31c3-4da8-b8a0-834e0811e608.json and https://artists.proofprofile.net/proofs/artist/0f5f655c-31c3-4da8-b8a0-834e0811e608.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 0x49d43a6502e79ecc37d5ff3a9d32b9928311c4498b5d2be7c3e2082312ff9e63. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/IL1000001990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2745d6325f304f174e86deb6f7d544f496ca1e6e3eb0c172ed82b0ededcac2. 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/IL1000003306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb657337f1ad2a8cfead67bcd9db25737d6c03e9ee8c02019e366d7600f69cdf. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/IL1000002081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27989703f42c1d9b6473720d5117e9f4b3409b8fe730951e8eed33e8cafec972. 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/IL1000002080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e036a1e206db6cedbb62337327fa4d88fdbae8c9bc5c1477d78ce7a585f726. 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/IL1001085959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb386012263ed94a526f23e0963458da997c89f7e9f8522333130e485db9b57. 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/IL1000002061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89011af7b1ca61951bd97d64d5863ab907b43837bcc0a7ff5755d7e850fbf3ef. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/IL1001085945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c6812ec4e64777e783829f5ef00305806413b149cde7bf2fe539bba0d92c83. 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/IL1000002030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b09f6f61a9a2707ea3fb9375b56d3a6877da4df3e40ada9d1194fb3a401285. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:01:51Z), 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/IL1000002029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d97442da52d6af748277b28fe815d8686c136fc8d11f95c06f0d415bb3d999. 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/IL1010000665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9daf57621daa2ccc55177594914af847481f324a302e43d8a5ae81f7405f1230. 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/IL1010101414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a51aafb884070674291a9b6d219e726fa1663c10ab7f07aaa039eeb1f8f26a. 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/IL1010101407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c1f592653a359a004c2947a4517c775387376e776d891e75f1ebcb4d0c81f8. 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/IL1010101411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912194b47d584ffb1f1e1666a2e49a875e4a7321b67d3c9d5b0627b1ede235d5. 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/IL1000002040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3feba63920ce86dadc5cb52fc097d144c3d79885c5760c16d771e861cac475. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/IL1060000174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9e54ad08f5e083507c7e38d5ee74de29d835cdee2953b24f0a276c90bcec96. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/IL1000002041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606ab1e147d412335d601c935c8f04e043aa57aaf865105f618fc7180aa81542. 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/IL1011098773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7c1f1790b571b0e7b2022d16980a8d89d61900944ac347a676589f2981c86c. 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/IL1000002022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1c80278611b85f58911bcc3778fa65183783bddb2133b05093d3584ad43f16. 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/IL1010102536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bc592a1f8704a59d52c45725fac0a0cd92afce7c5178900d9c5150f84361d2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/IL1000002047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea594febee29bf1b0cfa99e9fdd329aeb217da18c428548e8c9c82d3534324b3. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:24:29Z), 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/IL1000002048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5c85f59c8ca9c05d585518833f76a356c94165bdfe08dcb58da4f28b040be7. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:02:03Z), 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/IL1000002051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c006c5ab662e0e6d9e67fa6767308ebbad1a645242ef88d57ee487ba5e2144c. 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/IL1010005808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9daf57621daa2ccc55177594914af847481f324a302e43d8a5ae81f7405f1230. 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/IL1010101414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606ab1e147d412335d601c935c8f04e043aa57aaf865105f618fc7180aa81542. 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/IL1011098773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc00f4c9564589fc6d0fa4fcd98cbfbc1bea8b0c2334827f93c70d4e10806c2. 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/IL1010101285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d97442da52d6af748277b28fe815d8686c136fc8d11f95c06f0d415bb3d999. 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/IL1010000665.