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 0x04b7928a2cb2ad8106d5e6ec6937988ee0f604fe8b4dbcb87d725ddf1263dada. 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/dd91797a-8019-434b-9508-dac9dc22d895.json and https://artists.proofprofile.net/proofs/artist/dd91797a-8019-434b-9508-dac9dc22d895.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 0xb9efb711f6bde04b612b30e50ab50c93b5b5d2cc2298a125d04bfc15a48b885a. 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/TCAJF2592005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6431bb1154351452bdcfed506e1cb2ff9bfc75c732e403a9b2d6d6d24d0953c3. 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/TCAJH2525814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151195a976185e6afad38e893c2642320185590bf2959a3dd33c6300d8576021. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:44:48Z), 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/TCAJG2525890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88be8e5a571f9ec4975bd4311730dfbf8b701dedaba764d20db9ef2259b472b2. 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/TCAJG2526050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205a2f79d485bba76c1b97ed022d28e0c92868c146bebdbf02726d0fe63c3e25. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAJG2589190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ed86a8f8e2673288aba8f47739037cbd6a0b7f65e7513be17c03173f04501b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJG2589045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb769d9d7738539bb34b87993c32e552296ffbec41e3e4405f575defd19a4f620. 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/TCAJH2520277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49fe043da56d6bf2a1caabf37e1f706d78947b9f0811cb95836cec949b84c48. 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/TCAJH2523489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8fd78b0e6c7803db97a1eeda7e2e94d455f2a92fd7f27b4fd2df346251860d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:54Z), 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/TCAJH2572040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbedebf2481976628b3113843fadb022c89c957db2c71a2c0e49d29f77bace5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAJH2588210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6539fd11a04e416aa8a1178452f99a8c5ac737eac931fe7320017855f3c1e65. 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/TCAJI2524881.