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 0x8cf0b49f9292a40bf45756ba9f55865b88d5bdf8d190e919e59487f9a805463d. 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/0373d93a-4a52-4aa0-8c74-2904e36e6f3f.json and https://artists.proofprofile.net/proofs/artist/0373d93a-4a52-4aa0-8c74-2904e36e6f3f.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 0xf9ea89e004d4fe60266ba8ea1bf594415fe7fdc6a1b0cd507fa651e9ea37f38a. 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/USUM72219846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc2c9bef007ae14b3d802d4eb3e9eec15644299674e1fd7da52cb7a370ef879. 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/USHM80636793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c605575431057bdae697b417355789ffd35ba9795387924ad8f83a2916c02b. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:25:20Z), 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/USHM80636794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f6832c14d5ccecd4e9703dbc6e9dbae4652625b26d9f15acca85f7e8d8538e. 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/USHM80636795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efd82d503e4bfc8f9782a127b8e0038f6ac4e57166bc3e60c24496050f4f528. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USHM80636796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ba2c5e73c07b09052cd223dd3b8a8add2bcbbe950d78837cd14c0e962b359b. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:48:30Z), 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/USHM80636799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddb29455f1df3f008be92190bf34d57e1bb8fbeda743044223baea69d3eb494. 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/USHM80636780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe136d0ec944f6181e10596bb6f101a83c0dc17ba567782e269b216195acbe580. 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/USHM80636782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb61aae2b1e8221ed1d2506c46d25952ccc574019e846f406edb3f6daf980d29. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:01:26Z), 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/USHM80636785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96159af702491af4eac4b421209501da068d8292b4187e72e43328ffddd91702. 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/USHM80636767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d29f3e10de5946ac751fcf4b86a8c8bbecc3c4b943f2b5012fb90b92bb4d13. 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/USHM80636769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756dd0d96cd07ddb4fd8649d72e223b5b8138ec4d9e5d731d43d4a4d40dd2e00. 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/USHM80636776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93050cfbb3be16e3a17d44ce62af22a2112a34f0e8e65b04f8bb591b580dfa68. 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/USHM80636753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1e9d8d5b3f8281509faaddce1df7284b250f00497431e531f76f2aaba5684c. 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/USHM80636739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae9a8686b97855a64b8ce59c8dc6dcffc2e7443b301a85c4e4a4ec6610e0a8c. 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/USHM80636702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7705ec0fe17413884e151959244277f2a04a7cf3cd18e83550141842ae2dc4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHM80635832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69c48982a4da2e510411d6eb92fb7aa7a6a58b876cc1345ef658eeb9d08dd4c. 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/QZY8E2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8c576d437b7d957d52e0a68c9722ab54096cb0dc3be5299e33f587a5c9de70. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDJF2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad1c8cf7bd167de18501571f43f2de984fd277c3f22954a9f8a79350aca6ab6. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:44:25Z), 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/USVI20800165.
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