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 0xf2357d802b0432788ccd1e44274584f6f77b0a3aebe396da06ccda4779703dec. 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/ec423130-742e-4852-b51d-79ac818e70f4.json and https://artists.proofprofile.net/proofs/artist/ec423130-742e-4852-b51d-79ac818e70f4.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 0x5be4583b421dd6f1c49cfa92ff4cd3b949952a79f2d8f395b0d7d8e14a65cd1d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:03:44Z), 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/FRUM71901203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbaffcb3cd3e76f7280a1db129bb052de3c8c24b94f5c0bca783ecac3be21ebd. 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/FRUM71901875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda82ec834d9182844f55d1ee6eb2d69d3b24fca77fd3b07a4e0932fd3ad38090. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FRUM71902090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d812f9fbfb49966756f7f7a8d6b704e055038f24b1dd8b8c2abbc8680fa855. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/FRUM72000516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87850ce2bb84ab09c02babda67223d983455f742c6f9617644df4b736f893481. 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/FRUM72000927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b8a49b9e3cd9a8680f54b62edbbed7cb7d932d59cdf09658cf96d2fcd103b4. 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/FRUM72001160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694ed429a4173c4440ed82a96e9af90fc66b96e9c7f57d268be52a76144db57e. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FRUM72001273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4f21ec9d03effc327955cf31d1f5b718adc975c0c450988edaf5b810d7757b. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/FRUM72001450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9989c612a2bd4ba9c02922e919c8a4038167d0d1946824270470dae031fa91. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/FRUM72001483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87850ce2bb84ab09c02babda67223d983455f742c6f9617644df4b736f893481. 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/FRUM72000927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b8a49b9e3cd9a8680f54b62edbbed7cb7d932d59cdf09658cf96d2fcd103b4. 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/FRUM72001160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873742203c006437ffe888e25551637795ecc9d273466f9b0e1e4003ea18dc3f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FRUM72001486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d7fee201b2e87002c40b03992a594dd5582db602074ac9ee04f63e2f8068e1. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FRUM72001482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9989c612a2bd4ba9c02922e919c8a4038167d0d1946824270470dae031fa91. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FRUM72001483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0722822cabd4f094fc742885dfdfaa6a6ae4d2e79ce9129cdaa76b30b61e3cba. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/FRUM72001490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b00f8a2d0de48cd491895d5968d502bccf11dd968cfebb5786e40b2c4f9422. 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/FRUM72001842.
Joseph Pistone (Extrait du projet Art de Rue)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8b6bd6f4840c3d4c4e03c4aed83ac15253b41bab9c04341d64c893a890c50f. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FRUM72101937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc655b779061ed0b06de76ca565d5ec9675d59b03641eef1b402b385d2a9e472b. 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/FRUM72101513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd124fb09ee0934778b4e5d3818651e6c9d962b3fe0e3606b6a23044fa43a458a. 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/TCAHR2322958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53c82316e56d0bab7e75cc5b8d1af17aab170dec3b1b0412526668a39745c9e. 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/TCAIO2475131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57f10d318e5e037762e6395f511d323d6335075af634a77d6ceae5c05334606. 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/AUMEV2551450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01be345a56f01f3a24579107d894fa6ade260e7039018a503231f89712dd9b8a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AUMEV2579037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff14fedfe7a51682d3d4d0d47f756e46dce5b22aadd89f98a0f9a087df8b147e. 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/AUMEV2579051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50972c14d73310c429df904667c6a754ca224569ddd663cb231c85ca83963d34. 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/TCAHN2341831.