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 0x8af6b4664b88f5ac7c5e7fc5f7eab678ec6d7bef8d54da10b9fdf539c58ae6c8. 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/1a7992d3-f979-411e-bbd5-d77803ccd765.json and https://artists.proofprofile.net/proofs/artist/1a7992d3-f979-411e-bbd5-d77803ccd765.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 0x0645863b35e3247f37176359f9221f71ed1b34bf1903bd86b32df20a1d9873ab. 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/QZNWV2033456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd697f41356351811048b8a9270d84b684902d897e575b0b53d98554e1a33d91. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZNWV2033457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d04ec2ece6acb412e9025d349701a92de2fb693645b32d738cc9b65297234ae. 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/QZNWV2033459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd766d4e4f800820f2ac052f23a0134eec648a0e52e1214c4dbd2bf570a16a51. 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/QZNWV2033466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf264553bb63e9a245db5c2e508730b328c9ea89164abd4c93113eb45a09dc824. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:37:38Z), 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/QZ22B1890654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4944b40c1fb373a619f39890ec36f674a86cafa56fa760043cc730b88233d0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZ22B1890656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd107f8cea4340a19fa1c05a28133e0f6e31bfa330fa28adb51e1551a899ee2aa. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZ22B1890657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d27b32b39c569a4fa9778d6de7296d6e1c0c0bc25a51e7182fc60f3544518c. 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/QZ22B1890659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7769faec99fd2a4471353e648a8f7a25d682c521a2135692cc5bbcb2a71d5d82. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:44:55Z), 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/QZ22B1890660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d707c3702977f9cf87cd7954068045c0e5477aa689bc94008468d0269305e9. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZ22B1890661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164082393ed6c5f320b313392530c4407a7b636ec6a82a60eb70abce1d47a47b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:05:54Z), 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/QZ22B1890663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4ed24ef69f83c8dd8aa8ec3a697fb3c7b0a63b5b01f568ec633ddfe16e72df. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZ22B1890667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a1651f34fa3d0f7bbe4f5b3e9022043741079947e3ca49a04f39624f6fe3dd. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNWT2060262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f79d37d6a93578a422a9d9c1256181c6ba3d1c096da21e260f68c3961d586b. 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/QZNWT2060263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3572fb81c59ca17cd3fbc90dd6dee9294ddc5e0bb4c3594415bdf9fddb20fc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWT2060271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e8d0e1036cc75ea006a67102aba93a90f385129e9f2fa9cbf460e203f1324c. 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/QZTB32260984.