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 0x6bd306aeb9afc3beb2d5d5aaa33db06fbde12c6103f24f7064e1ff194fd9ea13. 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/4eee86a6-4e3d-4f49-b5fa-7110f742932a.json and https://artists.proofprofile.net/proofs/artist/4eee86a6-4e3d-4f49-b5fa-7110f742932a.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 0x2e1455df084e8835a4b01cbb84aaf6de3f70d4480528795c88feaadc55962a9e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM2PV1735744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff106196456701fecd3ebdc288bbebd0a2e4d1201b8af9271287a3aa30875e02. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM2PV1735748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c062aefcfa199add67bc81c40e6c7d56778d0512e91e43b27307fbfd4ad9f4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM2PV1735749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eea5548ff688a6e06995e37c77d3cd543026fda1a98c1e7af12e43d3c451927. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/FR9W11806535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d34bb100dc42ff01a3730d5f0ae584145af10f68ae470b491a7467e1344f31. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/FR9W11812542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e890fcb3c09a3fe9f0364718eb8fe58b2ac14c4e75ca1c04828dd7fb85787f. 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/FR9W11910928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb1a8aed3a089ae8614a93ef0d35ac77236c2b0fd3c8486391feec37c61d85d. 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/FR9W11910929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9865a4ab8b3491834f33b67eac51fdf48a35c58bff1e3da69fa862bf6089747d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FR9W11910930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e49c6ad1f9edf05a7fcdcf68190ff1447f374e50fdc6271de31521cd9afab04. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/FR9W11910933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa40b103efc6169438b8e29e23c2063737c4cf193f620829474b1928af9beaf. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR9W11910931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45ac5a0e47d21ca893b2e9f5f67accea4cb0f7601616954313b7c6dff922a32. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FR9W11806536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3d9dea6d8b4b5fa7e55a5f7fdd94b758203a3714dbb94150a94f30824304ce. 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/FR9W11910932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedc5457c1dc72b6ca5c4ee8067704cb96ef1afa2c7b73ac1996ae28ae593898. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9W12004137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e04bf9ccf123d4bff147415c312f72579049a68071282f580464a6b61df8944. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR9W11926633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbedf44eb5fb909786fc00756dfaae231aba19e4390f63b398c129ef6daace9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR9W12004140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54022af1de0885241c8a5e36acb939799a863ce456d4e505738ff72bbea78a4e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FR9W12004134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d02c9ed4cc97c85633a10d9e72a4607634eef8d3bcdaac6036563d02dd5589. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9W12004135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6df495150425306e0eb771ffe4f2e4aa4278224f5643d6b2f761a6297db5f6. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZHNB2037407.
Divine Comédie, Chap. 1 : Le Diable Peut Pleurer
Divine Comédie, Chap. 2 : Une Gorgée Du Styx
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7a5919de4fd621fbd3b2a775fb5e570524b6cd15b4506c2564c84c797e3801. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZNWU2035799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa619656fb95da795bcf61e087151233fd0c4634c7292a5f63553e66b97f468e2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ32178267.
Divine Comédie, Chap. 3 : Les Rats Dans Les Murs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0528ee77ed51048898a0485e260252a9218671c75605e4f2f210c73f4584d6a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ42154971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdc242afcac9f60c7ca8aade094e776b6d3ffc9350e8b4b68c4b02e7e7e1466. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZFZ42154972.
Divine Comédie, Chap. 4 : Flirt Avec Les Moires
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129e00d0d42927ee50a24461c1e1a6f5b60c1f87c233cd153717d80626f1bc45. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FRR642101334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129e00d0d42927ee50a24461c1e1a6f5b60c1f87c233cd153717d80626f1bc45. 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/FRR642101334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ea0a772bcff5a79f841abe741c77761b5279fbea499668eebdce012841ee4d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRR642200399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1a88a3392a542cdad10a7228fae470e9dcb8b2a59d2237f8d4cc9aef8dc457. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/FRR642200296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4dd1f5c7e82a0b3f28172c0da47b1756a2cdb51134613553360fedda8be6d0. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FRR642200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99dcd71f2eaf24aa3fd7c3994b21f29353d6a69dbd89130bd2e9cb4e530faf8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FRR642200402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed745256679b87b3ae7894c55d8f0922aef08046389b88e14f79def81555ef5d. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/FRR642200832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f21745c2d383acc5637988589edc15df4fc65be96a1dff425219bdd02870aa. 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/FRR642200732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8bca7b85f8061c9182a0531a9e20749ad1994b643d02fca0033d3385c5dde5. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/FRR642200892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f8fcdf3f70f5155e8f936244d711315d07c286674245f205c1340658c7089c. 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/QZES81904170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015263418096451474bda7515dd63793c2549ddeb8c1b0cbaabea5c2f290d2cb. 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/TCAGZ2338155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7da3592b2b9ad2a100fb2f17ebd8f7c0faa688bda6c9126ae2373313616bec. 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/TCADN1885562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9882130af23b2a63166051974493b55b575fe8acc9ab36858234defab9b5d6. 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/FR9W11811361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ae8c3e4939c51c9fa9759f44c7aac15779e3eee8f53464c7b33a523f90fe7e. 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/QZK6K2396078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf757aa6ec3661a36f96be00737801d128fe1b57b29af49c16b0ff035e0591d31. 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/FRR642200840.