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 0xa30a049a6d6415552d11ba74a4dadd0bc10a0e7a93bfd48f7d95624408ae5078. 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/1ff5de92-1184-47ff-8e1f-17f0f529cee4.json and https://artists.proofprofile.net/proofs/artist/1ff5de92-1184-47ff-8e1f-17f0f529cee4.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 0x2b59229bce1ef39d13ba2cb4c3c46ad9c56198ee122c2e1f361fa24df7e358c9. 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/QZHN52036288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabde7c2240c72198201cde26c1b4a347343b9d15f16086b9995cecb0c304fab0. 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/QZMEM2016663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6c6d2256ad0deeda62df9b5e722338255df6e1ab6c252cf805ac5a3a183341. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEN2032284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb16db2c0494fb9f6beba100fb8fa4d2042cdae262abb66494bbf44c39269e7b. 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/QZMEP2062623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9308c9e7a5536daf881f2e793129f28c7be52eab966157a51861af49967d75. 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/QZNWV2012648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48466d41ddcdc9cc3e0429c4bf549782b078856b7bdc5a7a74b6f581b838e95e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:37:34Z), 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/QZNWY2044401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a955b8031133d2adf7912c95a2d4991a7b42f9e16912eed53418de624db0f0. 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/QZFZ62191297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3152541c49b69304c64950e1eaa35ae00cd26e71155618d9a12658caf0cc6e3f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHNC2165121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c4397cd7f003b1c88f6fcd5d3a6661c646ad6e86082d013c19e0dfa508b1ff. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6L2128684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14c4462dedf69c57640316ed60ffffa9cdf61044a0bbd9e85cec5f05725e5a7. 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/QZNWR2196380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ab4d85cd6456994476dc1b0eea65feb320ab35f395a0f7c1177ace18771c07. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZDA62207925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502bbf75d7ae993aa14fd127100cb8147bcb0e5bf59eebaec3da82afb444f0b7. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZES62240337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc7ab64cfb7b063b12ab2ea66ca195d1c72fe7917e8fdd31894147d2644d7dd. 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/QZW9K2504360.