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 0x1cfa2e21d26da5e63a91b489e7c8887df1f6bef3b9e4a5d470535e5dd1a94257. 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/af24227c-4863-4f2b-9e6f-8d2e0fb903a2.json and https://artists.proofprofile.net/proofs/artist/af24227c-4863-4f2b-9e6f-8d2e0fb903a2.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 0x2ab739260e7c541dee9a6fe258c5593c1d713757ac8040fc7351ce44502d3150. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US7VG2064101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c35a90c355536cfa2ee9b6fbee5ec5553658b62d62478cf6916ade50ab9e12. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:42:17Z), 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/US7VG2064102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b835ef152d66626ce89b657f5de172dac052c87d01b3e0cdb1dfbc507bd5e45. 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/US7VG2064105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560f5cb182935f541b094eb580b27670fda6b7b82405014a9ab406db74a72618. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/US7VG2064108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffd6b290f1a136e76eca9e1d9384f109810de1e9bedcfcbea43fcea44379584. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/US7VG2064109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f7132b7d7ae674ed0b6e9adaf2292281c905102528c945229d3934a5a2c674. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/US7VG2064110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ad0129f5c9fabda26f6fdf85d27812c9ee243ca618bf9c08fa705c75415c69. 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/US7VG2064111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ef31a4cfe8a3376d43325f7dea1adaa215f08240cfabe2aa6a32e326b3300b. 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/QZW9K2368179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636f5e17d5ea2b3c876d79fb9ec2962a0b6f13d0dbf2e23ff35087835064a4ae. 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/US7VG2536731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4492c190172783c2a9780b82a4616a929a79f0345feb88a4b0ed575d996f8c12. 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/US7VG2553687.