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 0x8faccda639daebc96f6151d5ecde24258cc9fc5a4827fc8f58d7c0467c31bc8d. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/669fbe4b-24e3-4e57-ac30-6bb719c31371.json and https://artists.proofprofile.net/proofs/artist/669fbe4b-24e3-4e57-ac30-6bb719c31371.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 0x68ad034b74bdf3caabc93b06a5c5db70a1acd4381dc0ebf71746395d838dc0c8. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:20:15Z), 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/AEA2Z2545195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2bd01ce30c1327eb7b3504237d672a6e3183485460bdbc0d787ac13668fa72. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:44:24Z), 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/AEA2Z2545196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe518b3f2555af69e9c7cbfd229f4618c961a2d80ad6c2f0ea15090a90522eb4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/AEA2Z2545197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fde92133bb3372de2817072820cda07a2c4b18d42b0ef8045d9af9f808d9f3. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:45:20Z), 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/AEA2Z2545198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79ed92ec2d51ec10dbb9f276d41a208d0bb0780f25d824c71890624928c1d65. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/AEA2Z2545199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d419ecf97cf253e6474a353d90419674a67f1ebecd735d47ea1e7e2d0221d5a. 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/AEA2Z2545200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5360b667186ff1a1f8e58f2e4ddf4c90379b98867c4d50d785b2c02133ead4. 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/AEA2Z2545201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd436b19c17d18d53794e16fa5bf804660ce81be87983f9068aeb845cecd7c4e3. 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/AEA2Z2545202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81efc092c991152753238690639a19d1468b6a859cd3a9452226d6d3012e841b. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:08:17Z), 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/AEA2Z2545203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cd2de228812acfd63d41efa617c050f717be43be62327584bbbf60aced3394. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:45:38Z), 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/AEA2Z2545204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a7ef9efba386ceaa491d43cc749bbe86471e8c23f9f2902424e5ff61f53050. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:46:20Z), 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/AEA2Z2545205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81530f42539c237760b63be72f3316da157595120c41ee53106a9f2f3039d39. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/AEA2Z2545206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b44d45de8f200d419ec1bfd7fe971a63db243426d95f0a030018fe89b65938c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/AEA2Z2545207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed2556c2bbe607433867879390a331cf0e23a9f131c037d4d49cb65a0f5fd15. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:56:37Z), 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/AEA2Z2545208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95f9c17352401a53e2a93290101fdeb4ac929e50689923bebecefa6a45cc1e2. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:01:47Z), 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/AEA2Z2545209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77022223aa2f0747cb5b5260f0d374abaf92e945b1c33806dc42c65da9040b1d. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:06:38Z), 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/AEA2Z2545210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370a92ec56e8595ddbef4b2485f5b88198d172ed3481745699ced3eeb94ad8b4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/AEA2Z2545211.