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 0x98c13253807670d937c788744bba71ee28b5452c2218d51b38603fe2cfb32eb5. 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/a486cf7b-7460-488a-97d6-e1c048cc31d6.json and https://artists.proofprofile.net/proofs/artist/a486cf7b-7460-488a-97d6-e1c048cc31d6.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 0xa34ae0e8582a8a06f997cc5cde8c689f4619531bdbede947688bf5d02b02aa90. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX762295488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fadbe261eccbbde10c08d940f7f783f43589225a7622784d21d39bdfe75e440. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX762295489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6bab63071d8367f73f500b1d1837b77a95bbf7d9cb89bfa1d03b3a0152fcb5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX762295490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a649b1122f3ac4fb17dbaeed4cc08cea8f717d893b890cef4cdb22c742cc5d2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX762295491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665cd43a1f338d5da816c9650c83d11e6248344eadac8fb018c99e391706bd02. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX762295492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309e6fd8ed05865eed072a6f1d7da177a2106cf56f39f8144994bf8aad418e17. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX762295493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ed38a08d5bd399e00a9dfdf5c543d72721b15238d807f1af44d10945ed7cdb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX762295494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b09df799b28b380dbe4246555baae0b7fa93de77ba6cdbe5a34ca800c574881. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762295495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7c13bfd5bb5ecc4a8202489dacb17ff1d7e9c37f8ca17677ea97664e93aa0e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX762295497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70780ff13580f0ff7594e1eddb4b6d4c97c0c043d2284b5c1c7244bc645ede6e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762295498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b978302ffbca636c00d8baa97ab75db564b4230ad0f0c8ff3655ea31c747d01. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX762295499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c658bd51c8f9c5cdd5c2a46b517568ea14309174fd82304c5786310b826539. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX762295501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931583e241a32758ae6eee267886c9e8e2e3cae86fd0a9d37860f8efbd97e1ae. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX762295502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab926363a8b4bbe18e5c12717e96ab50fd80a84a08a2e88b1b79697c95e1a70. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX762295504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372ca22175541fcce636a046055a994b09cc79caa441a9e053a643753348a483. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX762295505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1d2e7806c97434c0658da87aee9bd0e727514e559da284f85cd4865669bde4. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:05Z), 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/FRX762295500.
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 0x4ea1f6c58e0d83e6d3da9da77d95f979d72ad609d9ca2f5ec2cf4ef080f591f2. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FRX762295503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3282eb9da8ba82e815bac5998ceee5bcd5444fa7c1590f3a6a3200b566ad961. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX762295496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f164eef244159e094b00b57d7f976e272293413768c2e3113a2636bb31b6a66. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG731654927.