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 0x5ef762bb3a0d966c72cc4b0cee0bc33ec24533704bf0ebbffe6bbd1d107e216a. 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/28f9d8c7-acf9-4e66-a9e7-58aed2aabe79.json and https://artists.proofprofile.net/proofs/artist/28f9d8c7-acf9-4e66-a9e7-58aed2aabe79.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 0x7c7376f2729851a48bce07cb299739c9d3bdb02016d946b122c249274fde938a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTAS2492242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa210fffaa42cf79d5c82b6169da93f4cd5f47f5118fd9987761ee1ff01f57766. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:11:41Z), 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/QZTB92443832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f148efc2bfd861c8a3ff91297ed7ab62d15c36315188a688eb87827563e2c54. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:33:25Z), 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/QZWFU2441378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bcd3bf45a6fec61184b3fd5310e1c8517b134e894738b48253670ead014472. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZWFU2441379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b7d5b1e0db12c241b85dc6c0bb2698b165f615187529d8cfbd04ae67623808. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:37:08Z), 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/QZWFM2487540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf109f1824fef8bba7f9292427b6833af5a4e6b0520c4b261d74ab39f52b1bf72. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZZ7P2461087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48efa08b9b3f9198fc1b7ffbfdeac5e6f98b879fc424a17c146247045ebd9d71. 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/QZZ7P2461089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d79f9e9d34a2a0965fe9a77d9d4d54e9e8ee32c433f430a928a4bc832d1560. 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/QZNWT2582171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5e0735cf800b97716ebc442bb0259cceb5867e7ca9ccd0493a3d96e0295ea4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:18:47Z), 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/QZK6J2522817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e68f47442bf9d88f69a1e63876fac6aa716ea90369f852ddd4b38355171d37f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:51:26Z), 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/QZTAU2557057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8408c1bca0267cdc14820893345206a685142d1abdb8c660a9d27241ec7789. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:26:07Z), 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/QZTB52530594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f71302eb183f184f9415711eac21dfae6c5db359f89b014bff6539fee256be9. 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/QZTB52530595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3d63fd0ae6d0f5a977863847e25c970b4e2dd980ea1b9955b7d9c37191ce52. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTB52530596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd879c2397f45a19df52f2fea5c8df0f9823742b75413165f8174b341004370. 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/QZTBB2548760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69c04ccf9bf2d902e2a3cff8c1e5dc1b51c5a1a5ca1ea4cb42d573e8eb065f9. 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/QZTBB2548761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577b27682c9e0eca98e3a93af14dec4ba617e739a58c74d3123710078426534a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTBB2548762.