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 0x2f2d1a5dc2d2040f2d092844726be013ae1fec870942f1b653c034e3adc51144. 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/f3f7f2ff-cdc7-4b92-bbdd-0c3e1e2778bb.json and https://artists.proofprofile.net/proofs/artist/f3f7f2ff-cdc7-4b92-bbdd-0c3e1e2778bb.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 0xf0d602f9e5ccaf6896648270e772b4bb538e1addc3632e7c44f5d858ff2d4814. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DEPI82446756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cff34117e8d509985f4fed398cf7f33a70c85f7b59876c8c96d0a0cd7d5356. 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/DEPI82446757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97c44923cba92ffd5893fa85c981e3c6f680039d53c3fc8162a6d275263ded7. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/DEPI82446759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db06a10d19086be8b1d2daa3efbe65fb64b02dcb8c6e1bde501393b9ecfd159. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEPI82446758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c483f4c17cc5472fc8254fcfc3ecf5886c9ef00769831975f0758161544e31a. 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/DEPI82446930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3622746d8b7362ae1bf5d2327622873d9968292ce914bcf4c458172ca556d3db. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/DEPI82446938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73936aeea1afef70e5ad6334b1964ef1c39400b9475022d82bf3202d2de3c9f8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/DEPI82446932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94deed3cc3eeaedc5de42989b566a37c07e0d2c4ba77477ee97a2273b3bb39f5. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEPI82446928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2751cc72427189bbf2cd6508deb731ea4dec17fc891bed5616ada439b6b88d2. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82446945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e806f25060f372d378d7d0851ec26dec029e7f47ba25d0b0161c312c4949f7. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/DEPI82446940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099891520c619c50e6b95850624d7a1b1fd506fd4eca89401eb31dea7203c408. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEPI82446942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e212794af108f4cb39b5a45e6b95c4bd9371394298744685ece00e521c9e584. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/DEPI82446944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc56ac70ed9edc01c066f41ac2c06bef51c57bfc6183caacd71d07f186dacaa. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82446352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549b742a3612c7cb55a2216d118ca79ebf233134fea75d9522f4ba7b77e8dcd8. 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/DEPI82446955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b359f6efd0f4c1ba69610fe10a8ccbc2223fea4cd47a6a00a2eeabcf48dcbdd. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82446957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fb41941308fb34f8a9a6f7ca1e60895563bfdf69073a89341aaadf868444d0. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/DEPI82446956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bb82e3a0f083f7c916495fc489e8df2cbc5ed920f37e4a63aa4528b0c91452. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82446958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3778f3144c7d103f8943d1dfffcdec07e160207b43cb1c384e19c93850110e47. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82447036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf11a0d327598ef2a2246214599ed842ac8d67f0f75b292d118ea0026ec096e. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/DEPI82447037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b818fbbcc87007adaf609e08f5c24de891598b81f218b6e9fef1926a3e9969e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEPI82446966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64ebf16d3e3c39e305310308b785604771b175680d4db44c40751819da054b3. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/DEPI82449021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8525c2891935b796ed755d8c157d16ad16f945a4d9b9551234b1628b5dad2f6b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82449024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673558f7632c24004a923394d78687e76207343503608d3d97622625c07208b6. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/DEPI82449018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad06bc3c0512125f1c564e80ae39b71d37e762bef688681e69489f45752ec4e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82449129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa003ad700e54c8de6c3d913c02198ccc04a7132f2032ab27e0dd919967b37b26. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEPI82449127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba10715c738c330df73e4ad9b769fb30cce8dd397b499bc51534423d7e43ea2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DEPI82449130.