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 0xfddb090ed4b0201a2397f9052ac49c921ba57b55accc169ff74fe29dd6e3056f. 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/909e8377-7763-4fa7-a156-5d5d056176e4.json and https://artists.proofprofile.net/proofs/artist/909e8377-7763-4fa7-a156-5d5d056176e4.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 0xe9a6f40f84754338c76e5f1898eb2f34d578204acae7bd71b258c39d45fded95. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TRAKY1600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1652eb8298fd88e6ad5b531c4ab9669c71a934e5e94f181f722aaacef6bbb66. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:41:45Z), 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/TRAKY1600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb258bfafcb2cd606f8f411c9295e6cab034b511d7a8992be99e5c49f09e5c96d. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TRAKY1600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe526ccbced6219db2795391ec8837320d04249cac83598cdfb6b3e24f1d8d196. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TRAKY1700052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64201b8299ed7e302bc8c97e2d2d651067d2acac5d53e7130562409fe0fa5e6d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TRAKY1700057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b339a2f400687ffea2a132788d1ac2e3a022697cd1e9bc93e295ed19feba12. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:04:29Z), 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/TRAKY1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec536b7455c8896ec33fa9c024ac51ace7efd48add07a264ddc10e03816298c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TRAKY1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f948fc2365d6cc59f18943b51e46ff4614f0cf3c6c29be63636056be2cb1184. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TRAKY1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b9fe413e55985d296775ec39385bfc78e00491ca0680711d5b2ba537102888. 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/TRAKY2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5241a56ab41be55f4ed8211470c1e17786afe7fb55011bd3d87039122aeb28. 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/QMFMF2011665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f1cb661af3e2e2a2d4202acac7d1010cca03c282781ecc42ee007a83ca5875. 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/QZFYX1979336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ac33b050d1f67201be6cbf6cc69db14725e4545ef2a8284381edc40740deef. 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/QM4TX2090437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3f3ecec644a2decf3976975a809ed9f4accce4557c9d2f90b5d68b6ba75810. 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/TRAKY1900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95410bbcc694ed96164d60f8d0ef67de2fee8ca529f117889953f633d52f46ea. 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/TRAKY1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413fd094b478abc80a737537ff7791e3c65f19a3f64441bdafa6bed5ea98cd6a. 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/TRAKY1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ea2ec22c0998a7056c205a93134614f60c608dba87f8d7b191ea3b6acb4701. 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/TRAKY1800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec82bc9e255a395787cb31636b584da94bcc145c094b8616f4f4f44726109de. 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/TRAKY1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec82bc9e255a395787cb31636b584da94bcc145c094b8616f4f4f44726109de. 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/TRAKY1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60cc700189037fe74dd99aade37b3552ca672a85d2b69d3308a95fd010b54b3. 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/TRAKY2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a763304a8800c66aa45ce0e181dc0e11509f365532938c8f9b7963f6b5942d. 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/TRAKY2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee343d531ba395ce20df20ce6967afde31d208a047b06bc8285bcfd531a90d9. 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/QZHN31978226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44dcdc5c15364be7e6cbb9a82d450650a62c75d0bd2eb5cb1cff9dd0dad47f9. 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/TRAKY2000006.