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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5715865fc299f267759622e93b47789d95c9fa03c4ef253b2843bea3c07345. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dad80688-978a-4598-87bc-31dc58bd2ba6.json and https://artists.proofprofile.net/proofs/artist/dad80688-978a-4598-87bc-31dc58bd2ba6.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1926a85fbe2154450ab1813cbac7c9cc74aeb97f9ebfca64944c973788fbf4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:48:45Z), 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/MXF430400229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6863fbb29fe273d4f68d3eff11e254141fb25bd5ea66df4e11940d7b4e45e19d. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USHM81853867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ac99e6745cf40326daff80428de42cd7c84b791bbe87653ebc85a9024d844f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/MXF430400249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d9e94a7ff68d61e84a905ad9ea54b094a7e84a89274e7e6cea60e751a757a2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/MXF430400253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1330be273c65e9ba961a8320ce25a2acc5b2960f3fc5d39219f5475280018e81. 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/MXF430400254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ad04441b85d2342b3a3799dbccbc912f96898f2d31adca1d19d973ee9a6d40. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:52:33Z), 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/MXF430400256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ec8ee0a39c8cbe951ede531aabc71214acfec47c2428bc79fceed5bd2ea3e8. 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/MXF430400257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f531b705820a28f54fe1e980628338aeea2133e2b5ee53f863e807957761f2e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/MXF430400258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153ccfb55e8ea7b526865122e195ae1785c44144dcaa0b178a975348673f064e. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:01:50Z), 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/MXF430400259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09282539999524779a5038576fd6c026050a82ce0bea0941ab87d1ee2d1cb05. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZTPX2238657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47af4e803d636ef80ae9bd7dc37c24ca365fa73473b3090e578328d9fde613a2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MXF430400264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa036e929e5394574967ea79a5e1ae166a54d3167d0373603d2c5108fcca573. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:12:57Z), 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/MXF430400266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58749d0c41ee70550d2617f6eb5ccfc5e31078e430cfdf51ab990d96d1a12ae. 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/MXF430400278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58749d0c41ee70550d2617f6eb5ccfc5e31078e430cfdf51ab990d96d1a12ae. 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/MXF430400278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda84298472b1790ab13b86e82cc66bf894912833f494f216465079c5366a393. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:41:57Z), 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/GBWUL2436667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156506f01ef2164f881acee5093e62d48fc36857b4eb576b77cdcd79bd0a1673. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/MXF430400279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19965662d095e47bfb792971c2305982c94c9a573b5b55ce837b6dbebe6e9a62. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/MXF430400305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7376f3f7445d9097674918b8ccc8c8ef34eae260fbd6db82c516dcf03b66a8e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:22:35Z), 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/MXF430400308.