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 0xded8f41397429861cc419934780fefa0601cde0964e38ed0c37e93459cc989c8. 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/9eef8891-e5ed-4557-8662-22595e4f981d.json and https://artists.proofprofile.net/proofs/artist/9eef8891-e5ed-4557-8662-22595e4f981d.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 0x8860473e28aadeb27878049da88bab4fbd0f53b84340ca5029d5585f64cc80ad. 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/FRD9J2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c583f3e4beb73bbd536d3d8fb974fe2433094bd8f14d5c62a772cad7adc7d9c. 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/FRD9J2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4c0e6d98f6e7843dbf87023b7ed79c88d1df619ca4ce8a678bda80c9546252. 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/FRD9J2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a2a13f428f09a1d0589bb42a34bd664fb464a0ef48037c7aa86f18cb98e71e. 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/FRD9J2100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5da1942729284c1e3f1f846731c2691943c3a3e2795e70b8cc2fddc1b5956f. 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/FRD9J2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2f4d03c5787aa229617bc7eb555b188a02695b046abde4e8b663501e070a46. 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/FRD9J2100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f3eda789b1cb815da26053739cb0cbe2d93b745be883addfbbcc6ff7187424. 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/FRD9J2100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4794cf4eef840d62b7c5ecdde70bf2ec7374c9f65e6a87f79750bab06081a4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR9W12254970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623ec913c29c2c0f3a11b0e3faf06e43cdd9dea7b96a83f6c0af15374b153b53. 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/QM4TX2311229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2974c3c3f54eadee7a99685daf30c4511b28faa41ffdbf42a97fa4d7f99648. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QM4TX2311230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5d488921ffc1b3c3a388bf3e284c1de8d365995b5c38bb53bc662aa4a1b7b9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9T32200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8058f4552bbd0154c3ba8e9a9d69cc8630a98a3798bf93fd82d0ca1413e6b820. 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/FR9T32200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432877b6a76155f5648e50948070e53abed3c9f9f7ca3b75ec3410f59a011917. 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/FR9T32200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5d488921ffc1b3c3a388bf3e284c1de8d365995b5c38bb53bc662aa4a1b7b9. 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/FR9T32200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9470ebceff6c46a2cd346ad7c0bbf6098a5c8d64c871e5a4f44fb020dae8cd5b. 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/FR9W12131334.
Cold Comfort (feat. Andrew Paley) [Mona San Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8860473e28aadeb27878049da88bab4fbd0f53b84340ca5029d5585f64cc80ad. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRD9J2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4794cf4eef840d62b7c5ecdde70bf2ec7374c9f65e6a87f79750bab06081a4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR9W12254970.