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 0xd9dcc5ef89ef8e77125cab7c111fa9962f21a15485d515125f9c81614c4bd5ab. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/754a9a85-6cda-4876-8544-dec294508476.json and https://artists.proofprofile.net/proofs/artist/754a9a85-6cda-4876-8544-dec294508476.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 0x32889ce5730fe0b6da7505764c046c5c73eb28888e76cb9450234b45f679b254. 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/QM24S1922732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666888691f8dffd4ed4ad7eb260c433c92540aee2144f0c2390ad2508b40fd96. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM24S1923384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf749b07b1c6dca7ad22df71588be5ce41e3f55e02ac1c1335f9e09e0915789d. 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/QM24S1923387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d51d03090ab2bc3223c0e84229c0eb037be2fa701a883aa672be22f0e836927. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:07:16Z), 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/QM24S1923390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4a5803f45a3d8c937ca594d6bef0c65d49e8357aca9c0ea8416fbdc3bb9157. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM24S2106615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffbc613f5819a620127fa641f52f84edf54af1ee7487405e6776046774a4a70. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:38:21Z), 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/QM24S2206841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9143751287d2a4a441fe26829754c0b6d2d78b13de27584baae1692ea2d58d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM24S2301427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac30ca1b70bb38ce4b4217e45d20ecfc8b5d574a8d9872196ee59946b995c435. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZDA82341250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e62761c9caf2c3a605ddfbad2ca96bd6d3c25d67c0cde67fddacc20ea3a27d. 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/QZFZ62326892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cc2c474b61062d71e75feae176ec991087f8408049297fbd0c06f71f005e15. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFN2360214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97c8d6aee37ad83be919391d52e659e8321308febae0208d15db10c4f7ec88e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:42:54Z), 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/QZK6P2471739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab64e4bb0edc14e427e52fb6a08f59ecf20c2e86130923aa3e15a3c6b31c13f. 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/USANG2445029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd079c868b507b993cf5f2dc115954175c217ce0e169114ca5d8b377bc9d31c7e. 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/QM24S2008147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acc373385b3bae33dc83697e0990c200fb9c88841c457422aae694815b174b4. 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/QM24S1912577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce961af758ea7a03ed60f5e845058d689b143c2e81c7e425ad36e7a1ccf9ba86. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM24S2301149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9d58d7f719dfd14b048f2d1d38a73086b4da6d57d3033a1d91c4d36adc7df5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM24S2105695.
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 0x02aa3c2400e8c11399870baef39211f788a7003fec97672e03aa4e812358a7f8. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:29:24Z), 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/QM24S2204291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62366c8d175cf52d63cae14b9b9989b5305d32ccc8476addd3bd9c5a788e4c09. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QM24S1924022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6fdf8554e724054492d5e748fef14268d8e23fd437b0fc7d6e3a564790e866. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM24S2101774.