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 0x48572bda6d83dffd99f1cb26a31e061801141a0bc850ea097d7a9cf297a34255. 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/1f57dda3-09ce-4b95-a458-0ee4fb7bd5a8.json and https://artists.proofprofile.net/proofs/artist/1f57dda3-09ce-4b95-a458-0ee4fb7bd5a8.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 0x408f35360d717e7cee0e0fac29324640f44afda0bbe64a32b6da26e23ec7339c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:10:38Z), 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/DENF31900325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d901c2e672e0f6230aecf43169c422c3c17ef5ec07a751f2b8641abbc971fd9. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DENF31900384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53963a7956750d997bbb81bfc1ccbf7ff17525aa5b31c33dfd3d14d7eef0c085. 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/DENF31900433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2447b76f40b00bca53ee9fd434af27fd76461149d42c1e7d8d0f84e3b34a1a37. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DENF32000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a45ee39d8782ea04b0db0a49c0afdd07b762b17024cedbb19b4ea6638ccc099. 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/QZGLM2022456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388861c0ef6a7a52b4ab56a165b7ccecb25a9c860feee854543f97c9a38f46ef. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNJV2009609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7417cab1427a82801e029c58b891d242d32bf39170361657737bd6005dab8b58. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNJY2043240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73523897fac670312ea7982deba35bd662a3b525aea9b4898a1e46c162e6595. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZGLM2265456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0bfc409976f9c11bd192f5a4e3e219d8702f2a8589700425fa96121b6b4631. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZHZ62203637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9448b2acb68c326efc79c1d2d2a4abde0862f69b54a7859cabbdcbfbe5e6ec30. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZNJV2264724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f24fc4dae8adf49497f3ef1745dbbf6b43083f83a61c6b7cf63f6c3c3a9146. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTVM2238655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8318ddede809621a884ae8236cd445ec61761bda60979f9ecf36d9cf459603b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US7VG2319790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fd4910f2cbd3b4b2efe1cf1de00bc090d3161520c1bff88fe8ce27cbd21675. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZW9M2204428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4810c17f7a99f0bd9ec40682e53df541c49a0550a19d2b313474ec11c0d14827. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZW9M2289338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c231903c209d7beba422eafdb5a61a3c2882c7870c6c6f2af731f130b9598d. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/US7VG2394447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2c0165b1f15935852335c2f6abdbdb23bc926ca132bdcaad6a8369e908e865. 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/QZMZ92335558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb171d6b258a2a2547e90fb180aa30b6732784400d9627b16a408b5fc8aa2bd31. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNJV2324946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979056ad36188bdc9430b5d2d8ec5ec95cff2702e01e2cfa795a1c95a30f52bb. 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/QZNJZ2311340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3637a6a50449daf8a6a7f6726d6a1e4ab8518a0a90f47adb7abe143bf6881ff1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMANG2248867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74acf02d1b07e15b8625f66080f17b053ab8b45f29a8e547e8a708e7103152a2. 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/QZ5AB2432493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1920120e4c13cc9a9b4fc563d47102fcdbf0e4f10ce818de799defb96a9b9a. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QM6P42494264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55b3c290b28f0df9d1c40d8ec44b3a34e5cea8c3862f742661b5d915e31e0cb. 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/QZW9L2484915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e141a176ba1e5d065117e5184d676f96fbcb5bff1178f22e606d2fa7a683d78. 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/MXD782201794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecf5278f7a6370ef992ff7af20f440b394d7f4a6646549bcff9bef69d2a9fcd. 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/GBKQU2414862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82e60e81c127b341174f5489bc9b4410ed5f3b33928994480eeb31a2e41a8f0. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/GBKQU2422721.
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