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 0x1b773f20775d19e74d2c0fcd3d9dac07805f08ace63196179df5eb452a0eb218. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/129b9364-2cae-4832-a22b-b82c1ab0ce07.json and https://artists.proofprofile.net/proofs/artist/129b9364-2cae-4832-a22b-b82c1ab0ce07.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 0x439b28aa7fcdab768c6e3eb84674db74b784e0a4c42c103459f0eabe9bc477c7. 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/QZS642395195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a1b56968bf6707582e6e23eb5be9b941080adfa53f89c44372e786f7070eac. 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/QM42K2397746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45afd68ea1351099065f4f6ca4374076901c27aff36bc030ef28e690b860083c. 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/QM42K2384507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7222bf8a9ac088e70ceec953c42ec902c6392a3e553b22ecc4c5dc903618584b. 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/QZS632345486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd5df6fc939acd825461c0e453c0bfe0a1fe6820d4a4bdc010d464458e9f1a4. 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/QM42K2363362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cddbab0c1cdb8c7e8a515bb4c9efb7d03552d650645de0fec94d9bfd3daed9. 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/QZMHM2367690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07683680bc24a57ccf738cd08fda32426ec0b245f5c2c1541eb1a097f0a2b48f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZS652334206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b5ef77329e44f7b74374bbe734adad1f022b8e75f4111c7853017a874879e4. 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/QZS632377606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1069092f4776af6bf54f3c391781f946c663786ff45861ca12c20d5d5083a9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZMHM2380681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777fd3c024ffc1fea909164a49496b427188c311ead67745ef9c358f12ea04f7. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZMHL2384065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822c3ffc10a641f805c99d0815d627c81db0c0432eefdea5561a5761d3ecc7b6. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZMHP2311651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c14de20e87df51bbc4a5e4be14d6a037ff7614c90a13621473b88910f719d7. 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/QZMHP2397154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86e698ba5ed4da409a8fe4adcedc21eeae29304c03d6537ea52eedc0e2b5a22. 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/QZMHP2374199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fbfe5503aef744c4c18434a8d63192029a7aca7d2016dce1bf215f57aaa896. 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/QZMHM2326268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4ea1c287958bfa0ba537e9806cff3327465640d1afb25378accb69ec1d6e92. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZMHL2304167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977b41b310bee583e585c2d5d7c6934d386e87064653cbe1761d945bf1fdbe7f. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZS632111881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1209679291eab2563d12e82cc7bd32bd1cf6154c4ee10b6e36728affd0ab77dc. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/QZS642116742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b99fdf224b17bbb2502213be0622350ac729931980453dc2ef8f40397ba2f20. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZS632148526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f6dbaea4ec83a8e402ef598d812e5ec553bb781ce8a319e5af8780fa71280d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZS652195720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3238c33c89d3b2957d0c675ba429b13de635cc155f075eb05b265305659e91. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZS662148719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048f7a83688a77d2cc45c5d584cd445051fe5923f797d1d73fa1955ac02c4068. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZS652155546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e29713ed71bf2d06507aed9ce508a1896b3d931febab2bc72396c215aa5cab. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZS672260209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c117da19b7eb5d520ee837f8dfa6f7aca54893d9f95ef75d663e05a2e3368bc. 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/QZMHK2245508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde267cff04a6a4620706a30a4f9f1d6bc6ccebd3120346931494979cff11641b. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZMHK2275042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c296e3102f8ae3dec33021db82d91186a220d790fc12d556b23130c8fdf5034. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZS642271316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d236697b3085e89d0ec39a6c5e2db583583b4857ef7f83ed66f15a567c8fe2. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZS662227444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1069092f4776af6bf54f3c391781f946c663786ff45861ca12c20d5d5083a9. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZMHM2380681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e29713ed71bf2d06507aed9ce508a1896b3d931febab2bc72396c215aa5cab. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZS672260209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a66c99de8ce7da17f1b70b26f94e25702c76bdba1c9bed75fab1209f57ddc9. 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/QZS672176041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8859f42078577d65068c4dec68d82cb6b5b616cd17219522cd3428d673091d. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/QM42K1982651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cb4cab7a331b902e8db732e22a33e4393546f128bdfec686d2892357853b77. 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/QM42K1949364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485dae02511233ccea83ed3973462acc9ecf7592df344002a6b5160305e96e7e. 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/QZMHP2089342.