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 0x8ab8b400c368dd4ceaac252dcf28a410f42553aaa0237571db49961915e1c4de. Chain 2 (Bitcoin): anchored in block 953600 (2026-06-14T06:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e3da53c-d572-4518-8d1c-ff64d7f402e5.json and https://artists.proofprofile.net/proofs/artist/0e3da53c-d572-4518-8d1c-ff64d7f402e5.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 0x1e12fce9f50f91869782fe71d95d7aea37df81650560c964ef0b64297efd85f3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPZ2470933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62ba48a7dab3ea6c860a7db3e5346f039588c3ec13992cb976011447a208bc0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPZ2430286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e12fce9f50f91869782fe71d95d7aea37df81650560c964ef0b64297efd85f3. 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/TCJPZ2470933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbeae84092c5fd0262fa9b32914d72a239318c34021eeb8a980b6ce5c479f56b. 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/TCJPE2529014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d7b597beb989ec2284db126487dffdea0db04593279fad72500d98a8929d9f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCJPE2555948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15614203dd04e02488ced0608771ba1fe65dc72fd19d723800610e5afe35626e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPE2555954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeba8d9a4624cf55051dc9df5cf8c48036a478ac500553b93d6b28280fe0dbf1. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/TCJPE2556127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0fbb5b041e0d71748f1857afe053b5c1624bc13e83d7df5850a6eef3ece853. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCJPE2556134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6fb71815970b9a2c61667365119a582119c199d5dc19fd9193e9ae86f23a10. 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/TCJPE2556137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8572b4489a13aad122d6ec92770300f2b46f7c4606b15e322f8db0b94e07905. 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/TCJPE2556143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e83b6dc2e6e6cced836575b4f9448b36e0825855d2e10a0eb6c07bc6859c810. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/TCJPE2556224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62bdcd3ddb049b6aca97a77db2dba71f200e7c1b17655704d8be9fb89f41bee. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/TCJPE2556249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f0c1485b7f6378af03bbc99b95b55fdba2deb33daacc42d9b645261159ec0f. 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/TCJPE2556268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d7b597beb989ec2284db126487dffdea0db04593279fad72500d98a8929d9f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCJPE2555948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e19434d4b1e5c35cf9357b591cff250f92eebd78eef3d9dd37c8ae5895325d2. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/TCJPE2555951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15614203dd04e02488ced0608771ba1fe65dc72fd19d723800610e5afe35626e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCJPE2555954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e83b6dc2e6e6cced836575b4f9448b36e0825855d2e10a0eb6c07bc6859c810. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/TCJPE2556224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62bdcd3ddb049b6aca97a77db2dba71f200e7c1b17655704d8be9fb89f41bee. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCJPE2556249.