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 0x7f7b3da335efe4ef3eea3e41587d8812b97ca279ce8945bd14dcac7728b45477. 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/a1d13fe7-1ec3-49de-8f60-5fffcb7f240f.json and https://artists.proofprofile.net/proofs/artist/a1d13fe7-1ec3-49de-8f60-5fffcb7f240f.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 0x9d4bde4f7882fb54bd65660b2eb433cc5ddadf8b41c0f65f3ec65277be8c8627. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM6DC1570764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d18003ef7ad27ee07ffd5e4bdd9b18fbbda7a1a2a25ebc26cf952334618c86. 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/QM6DC1570768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35d5b0816eb59490d3ed805faf66de8b2a92f439a392502f21d02937ab28894. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QM6DC1570770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fecd14e2b7b8d71cac1764dd2748c3cc5557652d4bee7aa4c2c8dba2937537. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QM6DC1570775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbda81cb9e60959291ba31a6ee552d8e79d70520257510544d32e9acb145e0ce. 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/QM6DC1570761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ccc966c2eb6d40aa0e5bbe4c8e2a5f0df1be29aec85314e660d62ff8b46bbd. 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/QM6DC1570762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4bde4f7882fb54bd65660b2eb433cc5ddadf8b41c0f65f3ec65277be8c8627. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QM6DC1570764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35d5b0816eb59490d3ed805faf66de8b2a92f439a392502f21d02937ab28894. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QM6DC1570770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7dd8b5bc31d64b68188f49736edfea4471af1f2b7817e72f127b8dc5de6534. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM6DC1570772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fecd14e2b7b8d71cac1764dd2748c3cc5557652d4bee7aa4c2c8dba2937537. 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/QM6DC1570775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be735bf6ea9070bce73eeb53c5749d62853d368d428f8b8c397921d72915049. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:48:59Z), 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/QM6DC1570183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9234e4f167a6c2b3ceb6077e49b274de8f68683dd96431fb9891494665b913. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QM6DC1569870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ce0410e4f971b13047db0fc929b9820bb43aca5a781ea8162fa8e0b399a1ac. 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/QM6DC1569880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bca575121fa1023f9f2a3e6cf2d8179f549e46a66a239263bf96eeeca030847. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM6DC1569889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9234e4f167a6c2b3ceb6077e49b274de8f68683dd96431fb9891494665b913. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QM6DC1569870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ce0410e4f971b13047db0fc929b9820bb43aca5a781ea8162fa8e0b399a1ac. 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/QM6DC1569880.