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 0x33d6c519ca407b4d0b5486ba8854fa9baee8ce758f82bf29714ce621258f950e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b5cf9f4-b13a-46c9-a530-bcb6e7c910c4.json and https://artists.proofprofile.net/proofs/artist/5b5cf9f4-b13a-46c9-a530-bcb6e7c910c4.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 0x84dee68ac35fa769f60cd01370c16f7b5c7aaa3e51fb3c23a9ede95c2cd81ff4. 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/USBS51500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701b7803caf948c6dd1e0e1ae26e814e78b39e13b5d904ff200e69df10ea8478. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:24:06Z), 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/USBS51500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe629d33c709b3d7c83c506632a2ff12abfede40cbe09fd945b96eabbe4dc724. 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/USBS51900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7063281c792144c4e9725bd22161bc8498af9e951ef5371c05af7c17b9199e06. 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/USBS51900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f85ec0214610e255fa7cd190b68d9121f0664608be90ee26ffff3c7a2efda6b. 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/USBS51900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f106ad8b9d0b99ec2195bf3cb62fa364ea7233309b13fac62d93d9aea8917a. 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/QZTAW2210542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353c3b4eeae908cc367af1bf40581ca20dc57a89e9ea5b6cac6c11ed995d7313. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTAZ2269089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dc41916dd100965829fd8ab0811cd7344e69bbd72c923ff4db78077da1ebb8. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:03:24Z), 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/QZTAZ2269090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1761a142dc53ce26535439cdd8cd7af9f17da949e1b5d2027074bbcd9789e8. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZTAZ2269092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfc84438a70e93a0094340dbe4a0f43cfe4787776f5ee787dfeec7fefa09199. 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/QT4QS2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac964399b958123664814c5123c29e3ba0785ab0a701ab88c305f43414c6a2c. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:03:26Z), 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/QT4QS2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c008b2747a10e95f0690040912051918835337f0e439b5f6b61edcb82a2333. 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/QT4QS2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7370064bffb45c26d4c930dc7a94ca551cac3cb24a74d5e702b908a319a3b825. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:29:00Z), 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/QT4QS2500020.