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 0xe5af390f4fe6a487cc916e0f91c3218f5bdd2fa66d9dad6ced88725a2b89962c. 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/72d4ed1f-e105-4488-8f76-54ebd58c8f19.json and https://artists.proofprofile.net/proofs/artist/72d4ed1f-e105-4488-8f76-54ebd58c8f19.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 0x2b9f1d04724b465274aefc2c4ac85e9c702b4c1b236ab7b3cded4fe83e1e8fd7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBRKQ2056266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2faed1fadb7d0231a5d9bcb46bae499332699101b39c2935f5fa266f3d8652. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USLZJ2176870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcd49ca6bb5ea21946f0fadc58ecac3bb0e2492b8be9b9628c67d114b6b9b64. 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/GBRKQ2316216.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638c02224be0afc639d904be364782b91480691814be7bc1205e97f1d0f7a417. 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/CHF032404696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abe1e07c3bb510201188d6b1d5c932046ffba74b78b0b63eb2945ff2376e890. 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/CHF032405321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282da7bc44bfc6093df6e8ec76122015041a576ae151866c3434c74ac89e830e. 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/QM4TX2404971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7995f4b40b4430681f8f3866fe1089a056d35fec3ce9a70d0ef322be3cc41eda. 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/QM4TX2404972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc695caeeabfd0ac10bdbae573db612d9528d81b3d6d9c784beb7c2fbc744a9af. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TX2404974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213ff6e97f21de897a29a6999c4ffbaf4871048356c300dc411cf0f073f86511. 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/QM4TX2404975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9618be6a78aad8c1c273147f54fa0264637308882a8d009273f6b453bd6a6a5a. 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/QM4TX2404976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abe1e07c3bb510201188d6b1d5c932046ffba74b78b0b63eb2945ff2376e890. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CHF032405321.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa23a29b2258bc088907c02974eefc3cf613ee08e943c2eb409a4c93064b165. 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/CHF032404699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3766d1775da9d31748900daee5e11b36b20630a0e421820e1d7673683ca66a2f. 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/QM4TX2404982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6170946e2e88d2de740f8eba5b16a792fdbf55daf7de2f1f82fe80c914ff0898. 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/QM4TX2404984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeeb238555a2c6cc2dfd3f368282eb4667a728d3e43bea19bfa0b8c377871b77. 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/QM4TX2405007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcd49ca6bb5ea21946f0fadc58ecac3bb0e2492b8be9b9628c67d114b6b9b64. 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/GBRKQ2316216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7291d03a9fa262c6db983eeaeb2b7496af5e4ab699a6340781fcf34eadc916. 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/QM4TX2405011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638c02224be0afc639d904be364782b91480691814be7bc1205e97f1d0f7a417. 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/CHF032404696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deb85969034ef8e442c55613c80f42f788ea346841c93380281d9372b10e009. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM6P42460324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a89860ddaaba676ae317ae53660121db536b5567ea9079e6031e30195c4a60. 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/QMDA72463527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f8888e83e3740163260d6864f8929b8570baebeee6b2c71c8a0fc79afa0c3d. 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/QMDA72463466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cea699de8cc8316226d4460dc738f378729ae9113bcc93b8da9197d6ea019d. 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/QMDA72463458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83eca93ca81ca7ac1283c5e6c71ea7fd0f8112a3ba1039bb34ad819d148cde32. 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/QMDA72463457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e75558ec4a5c02c0451457f6e9e6af550ac3b4a52ad0c7592ed884e178ac28. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMFME2580468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc148abfadb53ba978920af3813e2ef16b2c6ad405c6da9650cb2204c65a0e2c. 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/QMFME2429014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebb8880f268de7bd03f52ccd77372ae785b2b4f2091bd3ebe9576ea13916f14. 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/CHF032408859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac9436e26443dab0425b519f5d905cb3928e4f102b7d8c5795efdab7ffab1f3. 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/GX3HH2212569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6b1a0a1f7edc0acb1c5efdfc6248e311b77770737804b10afe3dab46dd1b88. 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/QM7282548087.