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 0x8b5845b59d1f7ad1579c72d0d9e2e955eee926d051d2f6866f2b4ba70f922635. 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/b3098dd4-fc29-4677-b1f5-1b70ea10f78d.json and https://artists.proofprofile.net/proofs/artist/b3098dd4-fc29-4677-b1f5-1b70ea10f78d.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 0x69fc06dcad81c914df129cad1a2649429f53e51e06644f639a88ef94bc9a8271. 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/FR9W11828954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b554e75827c0165e07fa3bca519a694da8b3aa4e785dfed611e92096fbfaf39. 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/FR9W11828955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b20a9499ae8a5812858f80395901ce02495e7ce80545cb39c048571498acef8. 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/FR9W11828956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78aeb3c45d1168875c1806324d3620b460f5197f7d53b38377749427e74188bb. 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/FR9W11828957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2d2d4b3cb87ced371d669ae8a942b4b4ed625d2df5899462d20b72c721d8f3. 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/FR9W11828958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c94435e6187b935d09e4a40b6f846ec894ecefdd97e8b6bc477975f0ba1f3d. 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/FR9W11828959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa924c4752645350a4bdb298b02358e2bb5e9822e535c0e1160617e8758bda184. 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/FR9W11514234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a37e58f9f09c6dd176b86a3f525720df6939e3b5960454daf88eb5f99fbdb4a. 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/FR9W11514235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d07b7605e39c164029163d875b86be2b5a730b62b3c914d1c2507dca7d146e9. 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/FR9W11514236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e53f6d3c6cc3620b39037628dafccfc94010ef353bca3eea92c4d69b18bc97. 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/FR9W11514237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bcdb1f3a984dc36d03470a26c547b915ad51dc670704523bae168498f40db4. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FR9W11514238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab16a1977d8cc7b4a4ec675fc900a3914a6768e2f35a62c84ea5d868e4bfbc2. 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/FR9W11514239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a0d0740b7ce6a22d00169e6ac89a6921deda805336cbb1076d51bd9769b0e8. 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/FR9W11514240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e2669cb48ebe3d72a1fd802006f95d5536fa6f22234f9ebc5d1340c782ac49. 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/GBTEG1200187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34f3a38ef2e5020b40a0d9f9dd19ab552455c9003da4a166cc19e3c0abf4c89. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/GBTEG1200188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d396439522aed022f28618c56fea9ddc0786bb8c3ef046b941d389ef44bd76. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBTEG1200189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf174e8fa043e797f703af2ef1e7a0c325880c08383ceb71da0e8242940029e. 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/GBTEG1200190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b1702674e6ecce4e735cebf2220287cb7dfe6bfcfe6275ea3cd4d74f7a02b5. 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/GBTEG1200191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89dd8cb69104714d5600572b1ca07b00f76be1e243fb85fcf6dc5be62d84d4e. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/GBTEG1200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56006f5c84bf0fe9cf48ec0a939ad8c89285057b30be76daca58128f9d98c332. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBTEG1200193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba456c90356c5a863e64692c9c33776436bb1e4faaa968df7063b6bdb1fda2d2. 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/GBTEG1200194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca1b4a34d533c69c76a65e2e4dca16951696ae321fd0e0db4a390da310010ca. 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/GBTEG0900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d990a714a065d7b4236c7624aaf2198ee52cc61d841b536d555642ac5f8d55f. 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/GBTEG0900119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b3379bc2b1c65b5b99df62666152b38fdcee636efb7202e4fa2fcf03006c1e. 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/GBTEG0900120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e09c59af689c67e670d3db3c2f00bee5740b2e61976faa2281aaab4a1e8f190. 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/GBTEG0900121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb35ec9b665992ec4407c1eebf0a25870bd0e2fc7482b94c5a9dd18cbf659f07. 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/GBTEG0900122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ef2bd15935c77aebea84256d06a84d1aae45db16657b5c61fbdcc7c0841011. 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/GBTEG0900123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e3866722d8a38c89436c8e638abe23f370284e880756cf8bcc632761109f8c. 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/GBTEG0900124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7855ec1c741e0232f34ac33a08f7f73e5f545138beaa44b5a2309325b3022a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBTEG0700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16ac0bf3f756ebf97c23ba362a9b1dacfd69198c6e213729b7287f88819af5a. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/GBTEG0700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44904c7b4eac890ec70522eb8e95a5ac5def1ec415ecee0dce69a57473b0808f. 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/GBTEG0700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867a7059d7707ba946e1ec210c8918b5156c1dfb1cf138dfbaf7491aef0d1289. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBTEG0700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f5b3418c4da13c40e27e6009ceaa10e517b7662159b135aa8cac5fec7b0ddf. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBTEG0700012.