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 0xe771bd698bb1ae0417cfe0574186da40fd7c2bf2c90fad91aa0bd1cb8b5dfbdc. 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/3937c621-d764-44ec-a47a-f579e32243ae.json and https://artists.proofprofile.net/proofs/artist/3937c621-d764-44ec-a47a-f579e32243ae.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 0x69d26c90fa8d73ed854c5c3baa544e2ed2970a693fd7b891b3403d46825584af. 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/USA2P1807579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaca2c76e1ef07d12fd311865af56f130f1940f175735d8cc3ffb72291b51704. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USA2P1820565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d69ee912ea0f9a747f138facd3e5b886267bc332df421044b596fdd8d80ba77. 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/USA2P1820571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86c0bc052834413e9cd8fefb17a54b14533a1bf08c976afe425cddba4d21c2a. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USA2P1889225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b5a6653105662620005cdd396e04d73c1a2c6c4d885ab7e551f20c9fbf8f7e. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/USA2P1916008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9962a57f282279a16889a89935498e271727c404912fe50bfb9c5f7e4a103c05. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GB9TP2001296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe823cf8ccf43ef02d8351b57aa023e507887e1be08ca8239fc09e448f4a077d9. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/GB9TP2001308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0861a43d063d739d29c0e0a9edaa6c4451a55bddb639eb295892842e027ff4. 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/GB9TP2001310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ef64af176442ff5538b7b923263d00705f29949dc19520fefa715c8d014ad3. 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/GB9TP2001312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6612f46a88314b2122a7d0a46c5052e96c479da119d361c520e8d519c18a906d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/UK9AV2200315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fe23b95bb9a925bd37706cb3ad0946055d34ee3263f13de227552f1c4171d0. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/UK9AV2200318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44b2e303b469ae8c06fa113c04d1422e05a721f53cbb1b25baeb8489b43e3a2. 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/UK9AV2200320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309b881c56e1c30c5a4f8b783431baa1ffbccb13d3f589612d485ece2f085369. 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/UK9AV2200321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec24fd127398de023923bfc7cdaaa983fd0379945e5635d5c2fbf43811ca0897. 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/UK9AV2200323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b8201eb532cb022540fc6b3d7443cfc69c286846e872853614a4d0d4aeaf92. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/UK9AV2200324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09623a62c85bc161bb4c7b3a0c243f60c15dce4caca4e70bc98f91b0f9d316f. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/UK9AV2200325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea67667c05587127c9ac84909817cef9e0fbb7f6c004f3ca52cc61121ebbc0f. 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/UK9AV2200326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc13b773d364dc32e4f411a7c54103589a2477a720c53cb30e8c56a9251e936. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/UK9AV2200382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd881ff048b5c4f8f1fef182cf2f0f43c0e47782add8e94aac1e112c582bd3921. 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/GBPVV2400540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4074068f7c184c33d239c4602f9d92adc66c3c847afee26aeb946078e3edc959. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBPVV2400676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4074068f7c184c33d239c4602f9d92adc66c3c847afee26aeb946078e3edc959. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GBPVV2400676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e95666acbaf7326183e1192283c42fac4438ad141604f2d3f335d296d3b6a6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBPVV2400686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e95666acbaf7326183e1192283c42fac4438ad141604f2d3f335d296d3b6a6. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GBPVV2400686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4074068f7c184c33d239c4602f9d92adc66c3c847afee26aeb946078e3edc959. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBPVV2400676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd881ff048b5c4f8f1fef182cf2f0f43c0e47782add8e94aac1e112c582bd3921. 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/GBPVV2400540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e95666acbaf7326183e1192283c42fac4438ad141604f2d3f335d296d3b6a6. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GBPVV2400686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53aeaf11f5a468a700eb0a5bdf4b53d860a362ca90af38c216653454c4e665f5. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GBPVV2400684.