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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b81f0a58a384694897d34dfa00d4237159f744652ca4df8752b3c83dc0770eb. 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/846fd602-63e9-4a58-9bf2-4dcab14c000b.json and https://artists.proofprofile.net/proofs/artist/846fd602-63e9-4a58-9bf2-4dcab14c000b.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e73130123af97b46ac041130507888f5000c2bb04514637aa82ea8a9b80942. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZWFE2327336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b045e03bbc743568324196bbe4acd76e9f5095372566b96d3d06f837b93eae. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZTB62476125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b661e69d3cea94f85030276abdd00b669917d14baaa4a42ce14fc18dd20ada. 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/CA5KR2491225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8613ac9eb04fb65a667b3e81eee035a817b989efa5f687824f66ff25ed62dbc8. 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/CA5KR2491227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54922f775f9e41aba2422743ac6b08e2704a2f7506bc37452601f79492103cd1. 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/CA5KR2493365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4339f37ef148965a2f16757e9b133629ba3eb418838f3cc35cf82ba18e9b4c. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/CA5KR2493366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85876e4456cee8ec105f9cf58dfe83003cfa53836886905ac2b847727c8ac00a. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/CA5KR2494590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2779c9acd96d524e865d3daaf39979ebef1a7557e1b4ee8fb0c69b99f354de. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/CA5KR2494591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380e50eecc8cf72d1e080f6469587db159cd09cc97d3599b97087f267d31f762. 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/CA5KR2494592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e43fb636d2e2a8b870da6e6693350fd59d4f47a9ed925a9f421395536cb0bc. 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/CA5KR2498711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9224b11998176d968985121c58f9f73d6004e0cbcfd13bcee0bee4becb987c. 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/CA5KR2498712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb28e8ca60b77a9910b6787a7d5224253d1601e40da3ce02df127b01fbb553f0. 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/CA5KR2498713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29e125aebf19900a51e632727035e6cdc1624198f89cf8feceb52cc70e68bd4. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QMDA72433210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0176a6c2c1fe40c626f1d65ef8658d2ad6d025941a7e4456e74fc4692857d917. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QMDA72433211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581fcfc11f0c4d001070c07cc9f79ada81c031b341e5a77a6a5fefeb1ded2947. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QMDA72433213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c37f709afb6c58318007be90dd8c411b5a75b797e2400e7315f2742b0c4f27. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GB8KE2426893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3944891677fb49058374a8e9df2e7ebfec4b40fbf2f415f101477411002c9f1. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QMFME2445548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d89ef68e83218b08d1b2cb54da6b7e379249a80afcf9949a0ac4fdffb8dd688. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QMFME2445549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d03995c970712581425915ec537f959331e046271ba9aed793a2d0a04552c24. 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/QM4TX2592620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c043e4922d2428ddc8d14ceefa641abe9e784d60584ebe9934035a6557080f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GB8KE2505596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc151600541aa2df4c5cc2673a5a8f39354b4b7db36030ca637d6c69f88b37596. 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/GXD7G2579961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f87456bd54677c09226501d626d82bad767aa73dfe40912b67d430db31f64d3. 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/GXD7G2520748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e5c70872ed3cda11428de6b90ef85dde0f2b6d88bacdd4e34b81bd73a4090a. 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/CA5KR2587651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fed438de177d3c3ea1d23f7432e235f74534d51b14e36faa2f968a4bef56038. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/CA5KR2590239.