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 0xc1ae5fd2febd9586753ce697e97a403f8bf326bcd6ab8f5d6e2d7ccd878a2580. 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/ed00d75b-5460-4dbd-9da2-98f33ad4f7b9.json and https://artists.proofprofile.net/proofs/artist/ed00d75b-5460-4dbd-9da2-98f33ad4f7b9.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 0xa3ffcc7e850a4fafeec9d6d74aba9ef8f6cc116e28b4c5851e042356a6e529c4. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCAFK2157376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a50ac9e2bebaf7250d873a7fb3228120d6075eb2930ccc53489e6d7feaddc99. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/TCAFK2157370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600ab8670c6cd9d8358d6d6008fe6a6e0ca7bdee8eb72682a052b16ba645aac9. 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/TCAFK2157364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5ac27181736806a392a96c965022058d991b2d74e55ad12f0ff33d7c192e99. 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/TCAFK2157377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a41dd966caa122918971c2a5b7be1a4076431b2ea0e81e8986a25e94c15915. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:41:46Z), 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/QZFZ42203377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b5824281d2f56c3628e34d30de84cbb0f55e31170798a95365d9f694af90eb. 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/QZPLR2209006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c5ed108d6f4237d8db4fe78983f42ea57dd1f076c6318833548ee1296d9f5a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDQH2376027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce3cb53deeab05f48af6f0814e73aecf09c6314d29abfb94ee5896f910e45b2. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:23:17Z), 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/QZDQH2384266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb82f287e89ac08f608ec91bac94ee2f3f021cec3f135229da455ea31ec2a8ce. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:04:23Z), 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/QZDQH2398623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f567cf031deb7c5607d66decb3fb24367723d8ff9050f32c9c06dd8beb8ff59. 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/QZDQH2419482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437ae4daac923f7c5c8098d21f0dfd1c0ebe4325aa0d3b268ff6596dfb24e233. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:00:54Z), 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/QZDQH2419485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2ba0a4760fc84e99f25459a5e6580bfa4cf156829af54073010bf942fc5bce. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:06:22Z), 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/QZDQH2419487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ccc7633b7886fb7a89604d021cc0db01f6ed09dc449844826ceabc0051eb0a. 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/QZDQH2419488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f7f31b6e7979a9c0b7063e6daab1d93f1b4a7fe4965da3d6c7565bfc61aa7d. 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/QZDQH2419489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe8f3a4e38db4d8ab6cdc5b818aee181318f3539371042045503d019620b045. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QZDQH2429376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab00e63f5fa6ebe705c4fc448b48b2413ac3eb168d42840f0dfb2b4a3dbc682. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDQH2529042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae85f20561e6868b7343a99514e6473779ef4b34100383a56babcbff4a51905. 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/QT65W2577825.