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 0xf6d8fab3e1f8c6f3947db4b11c61ae58d54fc1823c7cdbf96ff1b1b616c3df8d. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/601c4744-46b0-4d50-b6e1-63e10ccd4b6c.json and https://artists.proofprofile.net/proofs/artist/601c4744-46b0-4d50-b6e1-63e10ccd4b6c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x62a3f446a80378ed3cd6e5b5830b17aa53271c70062e09a2d8a2a559e4ea0a31. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBSMU8172312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf24666a3e49bda55bf5b91a09b76bd181c1897f91f1bdc8f278ec68eba3426b. 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/GBSMU8172314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3caf12e986c5c24a7c963d209ef68595bcf2209be3bab82deb9c31bdbab8f811. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBSMU8172313.
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 0xa9e0a9a4a70971c4b15562a56003cac9e40f0e3613d21b7166c4656e394f437c. 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/GBSMU8167280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505714cb36a20d5aee02b298d1a9473a69042261076fdc5490e07d180b45d28c. 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/GBSMU8167281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1d1aff2296e2f62f9ead77ec966c31a75817a81a8584ab253c0b7c5c799a2d. 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/GBSMU8167282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4c720a42849f9adeaf13df78803c7de01f091092f7413e640bb426f2e34961. 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/GBSMU8167283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0beaec7649d99ebba9b39df7c90d85e190f8c3717d8f4a60e9e1d6514c5782. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBSMU8167284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5408bdc0fcad27f058070edc37515904b099d9679c9ad01ea71b597e112415fe. 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/GBSMU8167287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77fbe3a15f3b5754a596c6e1932a24b2d7ee6decee581c4a3a9d44b81b4b0b0. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/GBSMU8167285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984d73b38763c24ce17f32035377fdf18e5a1b881e727166120a445f43f8de68. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBSMU8167286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674e7866ac879e0d8a2ec289915e92c94851cae4c80d1edc84d41437cbd700a6. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/GBSMU8167289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346f6d95a6117e94634e38b59354d53ad8926344ffc9b8b040f1da55f8ae4082. 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/GX8LD2371016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b2ddc87e6900af9a8001e3a75ace65e9e0d2aa4193e3ba56877af24f74a369. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX8LD2332979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf33cb9796a91dd94047e95ce29df27add8a1b57f308ca957e76583ec507542d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX8LD2304613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c5a9a0b1a38eac830b3181ed16abf3626297450402aa8a92d0f4b06ea9779e. 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/GX8LD2301064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43670923308d3a86b5f07393c2e49f959a15c5b09f9b52cb42d954ae4d923274. 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/GX8LD2331439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f885fc9d99615105331c9d8fb407d70b7f70d0a3ac63da2ba3b8dfc8e740a5. 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/GX8LD2323579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4030d79303df5240896f9a4b0d242b0cc6f226b96a0585d1ce558cbdda14d01. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GX8LD2361156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24bc976533e9c342e29d6bba6a854dd9b1fc436467e2400f98a2420e2648709. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GX8LD2353634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fe052cd0b1935fa472e9340eba08cf292cec98faea3b4c9484b1bf5124155f. 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/GBSMU8167146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4741ce69125ecaa849cb0e7cd4da4cfbcda52f2c66792266d563a391a86894e8. 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/GBSMU8167147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bbfc29a0bea3d16544dac04d9a76cd7feee250fa8b22c46489d1f27426231e. 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/GBSMU8167149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb617defe91fcc78fe22d4ee77c8d971f9ce22a488fd4716cb9a3f841513b75b7. 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/GBSMU8167150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862ebbd8022898273b1abb22850dacae8eb39a1e1dfb49ccbcdbc3f8ed2602d3. 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/GBSMU8167153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e483aa0194973eff1a60492a911735aaebd5160dab16de108e8fcd2ecfc9ce. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBSMU8167154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e48bd41604417053d8cb6c01029f735ef2f0cbddf747cb61df1fb0753c13e1. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBSMU8167148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c1c6010a094841cdfd4cf5b79105269dc843239cb26c1e2ce51b53dc24d399. 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/GBSMU8167151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6d546283b46e86f8042f99bde00da343804c80f98720bdcdc002e6ddab52a0. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBSMU8167152.