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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6557bcf73854ef5256c3a62cd993c89b0c7375416694d6044e9130e4f71e6c36. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3919f933-4d1f-4ff0-acd5-8ba4d12bdf55.json and https://artists.proofprofile.net/proofs/artist/3919f933-4d1f-4ff0-acd5-8ba4d12bdf55.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaedd81fc1f115baac8d98eaac0b79599567bdbd345c8d3b7ec1ab4a4e166975. 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/NLD682401600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404b71fe25e57df2b00ec98c98e3803b1f8aa3b6b212612d02844f00aa208875. 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/USANG2445255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bf323e5d4c63124cca0d1192fafd501da170ddacd6b4a5a24520bc315a0aa7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLD682400245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af146683d2572bbdcf3b4b08eb74ba7aef5b15714b379ded819a3d5b08b67e8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLD682400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c9a47dcfe88b750bec8ca471f0367f1c507e42505af5095241521ad1257e70. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLD682400225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64dfc15335f1e24bb185f53393ea0cf8d58f20e4cde1d7e2d6a41ea7a977d90. 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/NLD682400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713568ea1f97b954be6b34f7ae3b0e7e6a983ee05966a1225819f3948e80cf22. 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/USANG2254337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fabb132ac4a0668d338364a0963e4fee2daad0d0409631a52c59d9ce3e9612. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USANG2254338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8b0eea2051eebe3a9b7797f6a9c56c2a8b7174e484b40513c219496a3fe728. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USANG2244836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84b7bbe144984143fcd8f934cd98dd94d359621b9ca378c719f9953db23af5f. 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/FRX872295657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29524a2a78a83b43911958b99179cb9cd2a06fedcee3df63a88a68a662fda988. 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/UKZGC2302977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d30af3dbbf6d9efdeadbe01bfc6c28fc704cb4d6967799d95acf5a2c8c9d069. 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/UKZGC2302951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d8aa8d92353a23b8644429b5e989d5df6c7e81710fcc894857c8530723b850. 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/UKZGC2302905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49219dcbb878681c53cc720a75983596ed6bc261c305a30f1c8ce187f5302ec8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKZGC2302904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c1ab1f5ea79b9803159d97503c7b2e5890a392cbc6d6e5e2a95a9dbd27baba. 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/UKZGC2302973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a972e03c4dc1c09a06da37aef6f98518b68162f3084fa2eea953b641161d08. 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/UKZGC2303034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0c4f23b37af2947d2e8d04ee9e5d9ddcf5246c627e69b90fee3402493030b4. 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/UKZGC2302912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940935266bb9102c8c77a9ed836104e3e44d06837560a1e22676e436e31c6098. 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/UKZGC2302976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d870fd856cbdba5e230ecf7bcde65770fde12649b0fd76535331f40a51f0002. 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/UKZGC2302909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8351d862689d79d53488a378c48abcaa8db59d07d02e1c4230777bd5a4d13134. 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/UKZGC2302975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d62d0368dbebf58ae54f217619637e038e3409d72f4e97f83fdc159d0b715b. 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/UKZGC2302906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19d7b390557a0d60ec9d07ff6ea653af314ae90631738619c28cb87ff6661b9. 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/UKZGC2302974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0593bd280551d04fa4d94d72f1cf8005318b4c4719e4f4d28808087f16e9028. 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/UKZGC2302908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92fb61b2e8af2d934cc36bd4b01cb586ef2d707a8a2db01bfe26845f95691a0. 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/UKZGC2302949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b24dbe39a2635688c9c5e9c85ddf306b7a66fcee2776e7f613d6cc2ff5cddaf. 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/UKZGC2302945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5f68dca962ec7d0013609a1f36bd39fe0ac5ccef93a65241ae1d5f0df5d9e1. 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/UKZGC2302953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefd311b6e66871bc7fa69db1214356b780f86f9243835ddc048c2ae930b61dd. 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/UKZGC2302911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccb50db897e4c79bb7263478962c5358f702632c8ece6fb4dcf6926478c18fc. 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/UKZGC2302915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88ece7a9dd33a903a2c80d5db2b117f53efea259de767e14dca5d6841170e9d. 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/UKZGC2302947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb6309bc00981248aa7d7dcf19a0b28764cde02279b75f517120549de86b08f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UKZGC2302910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fd87b237d34e536d3c9a4186a4a1f4a8f010b4a6a8257a9d9de35b2e75d6bd. 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/UKZGC2302952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd677b40252ea4d498d3ab9231f8073deb59d656fe28acbcd5fe7e0acb54c31e1. 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/UKZGC2302946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fac3cd8b2c5de46d15a5e8de2a7e4d6ef5ff91de8bf749d07fb2cc93d69529. 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/UKZGC2302978.