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 0x4d2e55d177c621810dba8869d9cef42e00f01c1f8e0a725487815710cb20dbac. 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/19eafc12-0637-4da9-961e-b3c0e8609b5c.json and https://artists.proofprofile.net/proofs/artist/19eafc12-0637-4da9-961e-b3c0e8609b5c.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 0x05c5e6ad15bffc1f7d1af6fae3ebcb1c721e3b054d2b95a79dec44d1952423b4. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZGWX2122499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69e11d0b2cf93f04448305e9d478f9f5752f25969901e9e468d7812bf519df4. 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/QZGWX2192425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc499947688670f123e1bdf2d88a37c5573a2511e658488e9df9144e69441693c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPJ32131982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b09caae13ac81ca9adb868f51e9a5fd823eeda955c78e523ab880e47f8ed76. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZPJ32131983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf7e536bd254aaf0fcf9ea84dc1c23f08377ae97e77af16840e6780a0b8e962. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPJ32131984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fb8ba4d5230cf1ba13f7a0caef94f32ba0b695af93cb22e62bee6b040f6cef. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZPJ32131985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d7df4dfbc68b9bcfdf1fa7b8d6d6337c06fe32fd5e59d0d1583d202b490636. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPJ32131988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09adf12d13da7dddfbd0474785b56eacc5ee2c1e6878e5bf2ec1f59f308b27c9. 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/QZPJ32165083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe7bab5bf9cd0bebccc1cab2d03d6c795218910296f1fcb532cb5d6c8603276. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZTAY2354292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76303b553a157641a933bb22a55ef9945f3a5fecdcfe66a51a6c93dc16c01edf. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTBE2418094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649985f95971a0fe9c23959ddf4179635b137b1ed4ea41d06b3dd2ffd924bb4f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTAS2571245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bd5dedf52c15ad9e03eef871b521daad6123fa211e803458bc080b517309fa. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZTAW2581431.
Drop Zone 2: Hip Hop and EDM Hybrid Trailers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2697f775e7b0fab915141b84584eb3b55ed12612aa0d10980e529ae7a41329. 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/QZQ882303125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc447dde607cb1391595012f0f9896c286603cb3e93e59ed674250bdb12d03de4. 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/QZK6G2170941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e05a6a876b2af2b845657105ba11edfd943f67505c38a7a3f8d66a5d46be3f5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZQ882201406.
Drop Zone: Hip Hop and EDM Hybrid Trailers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010a4d8345d794930c409566d7487280bf3c0fca8ffc1ab712c27d62447ac267. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZQ882201149.
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 0x75fd4e49de77e254d2747931649866b14b2a3d152cd46926c54da663d547e814. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZK6G2170944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0105673a0a1f43565e6ba78868e9880e89e8ed6ec0ec8c4c3e68bda4ed317976. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZQ882200487.