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 0xb49dc2984a0b943206705416e7ef02e521522671fb3c619d0b57626ea3f86f98. 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/9c989b9d-b401-4f0a-acf0-86e2e720af23.json and https://artists.proofprofile.net/proofs/artist/9c989b9d-b401-4f0a-acf0-86e2e720af23.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 0x18a696ea91188857275992d788aeb41288dba50ec21fe777fdc5e33e6ced405d. 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/GX3Q92327630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc58987fef06f215248dd2d0acf12808c352649f5a9cb41e5470fe1eaebd1f0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN42172724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d78f78d2c9a989509e5567b326517c6af96023a1839c6ec049f51dbca2b428. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX202363513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f218f17df299053a96ca8108e5261571a1144ca1dcf7ebc75b7e1ebf92f4b34. 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/DGA0M2342722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d57c48d202d459dbd3ad77dd8c7f176658742be2e61b94ea5f2cd0b1d1624d0. 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/FRX452418090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31304ae82ff71af301df1d4859d15137ea8c9b6c90ce58aae056e92faad27123. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA0L2473512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db81012326dda97c6530b0b8231472f83a0a97070af0ac3fbe8fcf994d0e93d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA0L2473513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d57c48d202d459dbd3ad77dd8c7f176658742be2e61b94ea5f2cd0b1d1624d0. 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/FRX452418090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4778bd1bc1566ec68f508563b6cf70a594f8121f74dfeaf976a5471ccb11ac. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DGA0L2322085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f218f17df299053a96ca8108e5261571a1144ca1dcf7ebc75b7e1ebf92f4b34. 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/DGA0M2342722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e368f14508a7a33788a85403d0af6dd6ef65f31cbabb9c551918f12c2ec4f1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA092360185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d78f78d2c9a989509e5567b326517c6af96023a1839c6ec049f51dbca2b428. 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/FRX202363513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39341163271d05fdf82429186a42e3242bd5d911dfe9a6b44cbd9233470c7d20. 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/QZFYZ2354022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2cb2ac63767ef9652c9fd75cf1d4500b047e325ad11fa0de90c1bc9ed68b6e. 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/QZFYZ2354023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9023d75aed38650c1058c858c2a72e57783e902ba3328d9b8d3449a1c508f0a8. 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/QZFYZ2354024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc6080ae3a7d5aa4fdd254167259636890757d82375be1fb68c3300c6a682b0. 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/QZFYZ2354029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f59d854ebcd94c72b610f8647db9345ae1334e37fd7c390fd72fef710d7bd1b. 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/QZFYZ2354031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1334729406ee7e38d2fd896781380f59f8a8ce0118396d6a55f1b4cec90dc187. 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/QZFYZ2354033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f171ea8ee99893f6213ac1ab6f962e973618ab3828de51594fb385f7633a03. 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/QZFYZ2354041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad87367b614633c09aa1199ea6ab133a2e2f71e68ee5a74bfc373d675def8e95. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRD9M2403810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa64dac1f3c28b0d5c09e51e4322a30a585e11dd1ee770bb98438b194f325f76. 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/CA6D22200523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8f7c85c1c6f6e4159d6a3413afa87477e03bb303e679d73ba6ce4c6a9dc22e. 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/CA6D22200524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fbb6b5d4a1bf65ba5939cccd87fc0fe93bb64a433272dab19996d3a92f6624. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FRX202458751.