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 0xde957bf12010f79010db78d068a875c35ce286a381b757bc755c5ef4efd192f4. 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/907f1f62-c3f1-4b80-b079-84141dc24fa8.json and https://artists.proofprofile.net/proofs/artist/907f1f62-c3f1-4b80-b079-84141dc24fa8.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 0x67bc236815c8e9e6bdd1617f7aad090b4b3e7ee35817a0ef5d9dd0b32353ae2d. 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/SE6XY2163100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdafdb47d49f578739437aa5522f62b7c1eacf6411fa222d4307ca64f4cc21cb. 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/SE6I32223368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1f5089301652690c7c23de68ca911bafa92e9ef7150f570825abc0223fd9ee. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/SE6HN2278621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed000b09be019cf47bd007d47f4d1e799d6c019825e567ab8b6dc71dec96df78. 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/SE6HN2238498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5e1f6441e496350911119ec44f6861abe92597f6af7281330dc3bfa3321b60. 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/SE6HN2214112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e205d2e5764362d09e281a3615fb4aa89801c4f132d8cb2d3955cb94a578c8. 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/SE5752264544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829060fb8ddfc0dc9f79d18aee2d04e95f87074302864710b94a6558029a3cd5. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/SE5BU2296372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b5b731733593a90401f4f05a1188537e2bf3e1ec964d87a4d86d55c896796d. 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/SE5BU2248754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc962606def834cf7341aab203354402a43e4e3ecc171a1171252afd421ffe134. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/SE62M2155665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ba11139868cf49630e5734a6287156f376f687a6b1716a5ab3b08a653ba903. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE62M2132365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b99c218f9a379fa03245a0f62d0e4b5b2735059e76bbc90f6e7e61193e44ed4. 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/SE62M2110506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08046f037bfec7695d2aaf883cde5fe21e63c882791af8715a9505fa4820543. 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/SE6XY2141403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12febff0960fdf675990c2da29f075d0d4f193b7311d9f15fcb82798baf72d76. 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/SE6XY2120111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c1bca417434d210317ca4841409698a48e33fc867e7f778bd329994abe1104. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6XX2197633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e89ef5fa25f720b5405245cfbd87ab7f67c1272d49298d77e91594e6936d9ba. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE6XX2153394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f49abd39670e7393d4445a0d89d8c9745bcee119365b5197e3f5893d8ac93f3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SE6XX2132174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5906eddce735c78fbd1d7e5e56849ef78763a3f2c44a0fa9f0a7da9d4d094a78. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/SE6I32286865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd5381bdf6573cc70913216d6da63e08b66c9f8c92b37d8a18ee32398fea63c. 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/SE6TI2191880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cb904b2c8999c1ea14e6514d3663f226ab86de957bd6054797f7fbac8807fc. 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/SE6XW2172008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767b2eb64d27605dae7f40d9adc5c09417e9713cb412b0f3daf9d9f07053b05a. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/SE6SA2101054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd545ad233271711f377f9e0ae6874ce3c7abbdd606e4bbdd4e9c2e3ad1cefa66. 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/SE6I32163840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1334f93a5d6e29711e63cd6bb0a4802353ea550bd0e0e56ca63393617d2dde99. 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/SE6HN2104137.