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 0xf26f84e8b2e429bf946a27a6eccbf8393c0f91c46feac29d567dc767ffaf4732. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77f397c5-9edb-42be-a2de-96ec8f3fe681.json and https://artists.proofprofile.net/proofs/artist/77f397c5-9edb-42be-a2de-96ec8f3fe681.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 0x4874f5d9f7789e081aaa077605c0a23fc50d8b914092ec88066ac075b65d76d9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM24S2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8b0f50ef18beb2f638204a96c4cc38fff6bc55a161010d6d5bff9730c29599. 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/GX8LE2381333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c81cf048f23cd194c2a901b6face6327446198ba93845ff49ddfc74aff2ed5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GB2LD2310233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330e779cac157b27cfda8062181c782755058e1003152ba3a655e85baf7a351c. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/GX38U2375324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04ad8ead21b9af6c2f2eb62372c05914ecee2ab67e2ea67fa5e63ee1b22b164. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZS632351624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f45f56fa5a507b28ae8e4b86bf2bf47d5788ceb3335dd9b0cc0d7e79ad04130. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZMHN2388049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4985e8aa8a356f4fa57a4815cef3fd34deb49948fc627d6dae5e9ccb7e0781f9. 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/QZMHK2287668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1818877adcc5293e291e2f15b7dfec0386283cd3c36623c32213d496796dc195. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMHM2209943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b9abd6c735a569fa37d6e264694a66f7153b60ac2dfbd8717ce501d0aabc5f. 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/GX89G2434107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa033b334a2a7f99642c7615000c954063282ef5cccd0eb2974f6efd3feca9a62. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMHN2447013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a574c6878497ea312d5ddd77815cf0a2c6bc56a315fffa548f553b1a6cb949c. 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/GXBDS2443404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5861c1e33e41c312272ce62daa9e7bd345e95c5a9649bc32373224bf09eaee0d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GXBDS2443485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1cd7273a0f806c8f1c29733ca5acd27591e7a7efac90db97199cd4ca2dd8fd. 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/GXESV2478161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a74062d10f4f6609f40cb40a7aadab61f60257ff0187b4c3a0a7af1b74f2bc5. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/FR59R2570887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cc6926ccf06992586db326091676c8329f3161a5482ba220caaa0c93671b9e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX202536425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274b2cfaca02771d075feb44a5f21c16d3801864e314c6234d841a54c0608abc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX872524042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb99a1631dcb53cb17fa6493f1cf208a0181ecb3d0f4a3875f5546efbbc6b4f. 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/GX8KD2284009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4ddaa8280223bdbb5b42cb4b958aabcc907241b6c2d0c9ddc52f7092cd6aef. 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/QZTV32365253.