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 0x8061e48af176056dca3d79fb071bcae53b3230a36a8f54baf4e1438d73f84807. 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/88f22ad7-35c9-47d1-ae9f-569f416d01c8.json and https://artists.proofprofile.net/proofs/artist/88f22ad7-35c9-47d1-ae9f-569f416d01c8.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 0xaae5bddf70a6ac0553a65e3d173470ded49ca5121b868b61a576d7c0237cfc6e. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QZTVM2353334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042890a95e05b819dfea9a80c8ec98332c35aef91daec6616fe45a0a515bcdb2. 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/QZW9L2324003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc359b3803be7dc43420286009b2ad7f954445f7e6b036ed690c37a2f16142b. 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/US7VG2463391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d19b004eb8dad148504fabaa95df892d35fa4447d38573f969e6fcefa80b43. 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/QZNJV2471320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2600df9259b25190079b1d34fd7824963bed60303b7f79f7f50e12ff32532f6a. 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/QZW9K2424593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a678c1b2e3be53fe6a00be0b9bdb82505146e31a0a4517333e9ad74b160e8c. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/BKFUX2301892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4add176727a7e5b6b6322cf9d27b39e2f42e875c3ba9e7c0310c06af02d76c59. 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/QZGLM2579797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2384d07ef67c18b05d726f28b6969da7e80e4eda1593b4926580a3102fdb4b99. 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/QZMZ92595228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810be86e1032a91491e852dc2a738d73ec20fe641bc0474bd116796fcc7e09ed. 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/QZNJV2549619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c6bd367f36726c624db3b4b875ec8571e209eea32bb10c41212973a2e090f7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZNJX2556857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa992e08514b81a98b8a0f5361c850c7e2bca24c514a1bbf23b43c80af9e6dd15. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZNJX2562162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33954561c76c925fd27cbef5be87536d2025a4cfd0b9c20a940c657e356f762a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJX2562167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057d7489ff5cd8a744cf55d8f3a5b00d65f44762bff88996d137ec8c2b85c578. 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/QZNJZ2558601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99308b2184534d8629edebf7a5446fa0a5d83c7dd06f65f8f28cfc9e3379b887. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZW9K2516458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0025d47cae18784941bc9fba55170b803fab256ab04a389d20dd50144cf71285. 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/BKSAI2400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d4142a2dbdf54df9d44a527c5f3d13f3c27e81bbd51a55a88d5d4822af5f38. 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/QZNJX2490570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5184a59c5d28c3e48fdd00ec6e7c9f585f3709111cdb21d5e1986d300e51bdc3. 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/BKFUX2301752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2291bdad57bd55da901e9a51e109aaf0264a813437f18f203df7d2d7056070. 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/BKFUX2301726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be51ec01c8a54582ab317e8eb5aa0e8a97fffc5c5e5ed8a3c019a51ad52f17c. 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/BC66P2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc5f02fb7542f6c4cbc3b937bfac7c6693d736fc37affd6f59756e24710926e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BC66P2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04535e93d93395e29bae402a43cf02f2a19c42474dacb9c683e08aa396b931a6. 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/BC66P2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9b31774441c0db935bd038da2ce6c53c62b4bdac00ab7822cf8fe903e0810b. 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/QZNJW2479541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf434c64d294e273a60012ded11e2d8c53d500216a22c9c2073461dfb0150dd3d. 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/BKSAI2400195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74ca933df48288392c54c9da0d338f1d081987aff7b26f7f4626316707856c9. 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/BKSAI2300192.