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 0x1db715abe5a352545af6c6c3cd43284edb7d8bfc4960372aa8ebc70821785712. 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/2037849c-cdb0-4507-8404-7e48392608b4.json and https://artists.proofprofile.net/proofs/artist/2037849c-cdb0-4507-8404-7e48392608b4.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 0x6ce44887dd19750bf013d62b62a75619ee58e3e7df16bb3fe07af9da7ad439a3. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZTAX2200734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafe98d630e1b42c91f916b31f01194b49a21eab35f52d60dd580a744750e4e6. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZTB92257661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899291747432107065a880531944a4f100c0f820f6e15c9eb500936e89eb85f7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6K2310795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83e4061b078ce85b737447cac500b0852801dc5ac0ef0589d6be733d6897c6d. 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/QZHN72301238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad90821260c6b4ed767d03352af4ae9aa237dbbc1f0d648166035a4f5a10b90a. 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/QZDA42329796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa907a3f6b41b777766f892bb1339076fddd40d998794266f053d668b507a093c. 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/QZSYP2320565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a87dc656720dcd351dd8630207399a69ef676fdc707c001094fcf198b3f268f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZSYP2396358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed6d58b17b935f964ae9d9a6a055ba92a74afbb20110c08b11376baeb6f3e1d. 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/QZS7J2352126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9537c8d4015b6e9c040be9bac46cbbd001c510ed2b19ca140213576eb35a408. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:06:07Z), 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/QZTLA2450315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17515924c04f14b9dfbaab74409ea43e247036310d30eb2a4668e98a02612abb. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZQAY2487566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba358b06c33984f5e499e31fab66c00d3e03a6f1b653de8db8ea25ebe6d28d9. 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/QZS7J2437680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed9ba9ff77b8b2465e59648a9977e6f96cded789dfc99ee574a6694a45b0799. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZS7J2430971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8650c2f10ed337747f25917959cace76932ff3c0ef7480ccd77ddd7f9ee054ce. 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/QZSYP2438156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac97ae5c6305cf841b9fb1956122dbef75a40ae4e9b1fef813c33a11543e70e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZS7J2457806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26383838dbdef30d81a7496576c6ab47b6d2259677bcd20e9af3338134b58b7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZS7J2420275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957fe80eea0faf5f71f3294596725b18fac3ee4cdcb35e3bf3d179cc843b2deb. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZS7J2423262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2596365b3f7aa746f39d6b09667058e10dbdd42cd25507857ac44a3323ba436d. 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/QZS7J2458839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d525eedbb92bc9619a888a2099bd4afdc8a4a1ae299551eed73bbabaf2ffa4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZSYP2482772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac82df0393b8d2db5ff9a6d8dc4255e8903afc947a941b4838c6519c53be7540. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZS7J2441660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787c49e5f74a8dd93ffb1f3397f9b7541699d35814eb24d58a69fe58086d8906. 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/QZS7J2471987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930ca2d61ce48a7069509a030eb7a66406335aac4d2e002df71af2426a66b95d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZS7J2464897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1aabb137fdfaff6ff4551cd285d955491590c9e9e39dbee8076f8f630c1013. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT3EZ2468063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464b3596af070197160241cfedc0a650538b2e3d5a0f292ced32e70835d68d10. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN82379287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb861bcc54bb38461a5ec63a05f34f4a8e3510c081e01a2bfc62fcd137dafec6c. 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/QZHN32492889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd67c5d96af62853a32b9b036336be061c20290c42bc1d0bea8844c116ee00a3. 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/QZSYP2308538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68463ec9c1a50f4448f6e2eabb8df7e4aea48e2ca2633809a818ad200698a647. 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/QZSYP2364108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf681cd283edabbeb8cd2b8ea8d07809879b04b4ea69dddfa8960edaf9d2e0a8. 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/QZTB22255890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74f7eb18247adb7309fb387b1753131ceb35967d156090d82d7c9af740e9793. 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/QZK6Q2555676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6db6bc73aa44519028952ae829d8fa2b80f38da5da89ee48b3b1b8412f26a6b. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:38:47Z), 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/QZSYP2302422.
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