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 0xf8ff17a5e774213fc0c52f7ed432b5cbcc19596e977883545b1499f712ba1995. 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/9de75757-92ef-424b-b9e8-7d12b63a85d4.json and https://artists.proofprofile.net/proofs/artist/9de75757-92ef-424b-b9e8-7d12b63a85d4.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 0xd439875ace0378d1ec106bd7a58539d692e5436809b2b6691532a830c7184b43. 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/FR96X2393413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3346c9f1c0e50db29cee42174894af204f4b5e7d5f704ea77d8a0857291f75ae. 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/FRX202364271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9016f25fb736ed3668072252ca3e5d4c899a8a7a0f9c163fb34098f475ee87c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX202364272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ef170de4441f7d90bb3efe4b5ec7161710c2e6fb2b11b7b3bd2223af3f34eb. 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/FRX202364273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cb50c6b08e3a3ab60a6bbfc1aae8a14cbce5c2663a39cd1da2838a6e86230b. 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/FRX202364274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58130dcd6132874a2ba68c12d10e49a2d736122b021e2e59164186cb127786de. 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/FRX202364275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3015cef5991d91eca24b2298e448bc7ba21806747130961745cfe1a0de8b93cf. 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/FRX202364276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f32845893374cae95507334d400cb1db0de2710b96b718add95267b0186abb. 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/QZS7J2339867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cd8c3fdc6236589987deb7ad2e03f7a06466c30382b9ca473da06b5918c1b9. 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/QZS7J2325273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd439875ace0378d1ec106bd7a58539d692e5436809b2b6691532a830c7184b43. 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/FR96X2393413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47524247074d60d852c2182109e803ed4209c9ff413cd21c8e815e68e35c8ecd. 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/FRX202209781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef63e2dc8f0a8b8f1c45a34bc433b31527035ca8f0c409a6c7887cff100915c. 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/CA5KR0012385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda251c8b1daab35e5191c27c4aa548ee318ee8fff22726b1ee7166d2596d2a2. 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/QZMEN2108350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f672fece980bdaaeccedd16bd828ac5389c8b9307cc2b3684a0f038bc10ba4c. 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/CA5KR2044340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb71ab29336f7fe2bdb64252fb9d38e3b1238efdee29f175548f12d2cccb4511. 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/CA5KR2044341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae307a09c7e0c27feee462ca0527109751e7ec0953b502ef6d3c95a1d772c1fb. 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/CA5KR2044342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c69b74d3f3059466f402f45fce062283814d8a6ca81c0e51c3d9761444a3da. 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/CA5KR2044343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34400baa241e2771fc690fb4f54b19cf21c2c5b1bee315806e7996337c5e2267. 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/CA5KR2044344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6a6d4e52f2b57e606c050730feba40c19434be112b5ec4384e0829e86cf07c. 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/CA5KR2044346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf52597315d3803025e34b5a333f5bd4c3514ef255a2b2d041b2ac7fbf4f0b6a. 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/CA5KR2044347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32041fc9bb7d40820e100c640f2091997fbd834017cd86cd41f5da2c3e2193ce. 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/TCADX1805341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f719b5cc4194664eef7f6d2f504c29987baa2291b45216e52e3a505f462b92c. 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/TCADH1706881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f8ecf092b42bfe26b216d9a079a13452539b9d732f34b4eee1d3a39ad0c2cc. 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/TCADF1723632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d1260727238fd636cb5b9bf4e11626619faa063028b27ff0dc785e56766e42. 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/TCADC1792385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b364ac458a3f9ed316a3ed07999eeedab93d5ce8a535fb2d2bd5896f17dde61. 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/FR59R2460859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ba1b50327f3f0045c19181558a76c73219743c53d494d99e1b8ecad97a0bb6. 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/CA5KR2413673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafdacfa3e373d237cccc0ffe684d7ff86ca136d49e0ec6ccaacdbeba3af4f14. 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/QZHNB2390880.