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 0x66314fc74715b705202314b18a9783794dc25b1845d5ca5d756ef488581476a6. 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/2e59a5d8-95e0-4e5a-8e58-3336aa5c6c99.json and https://artists.proofprofile.net/proofs/artist/2e59a5d8-95e0-4e5a-8e58-3336aa5c6c99.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 0x0ba070f877f2ed34089fb2f117e025077205c70289f3f9891fc723bdbab234f6. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/FRX201908870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a3613e01fa73aea16cda830c68534c2f5ade77fc295e0f503b449230e41360. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/FRX201908871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba070f877f2ed34089fb2f117e025077205c70289f3f9891fc723bdbab234f6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX201908870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a3613e01fa73aea16cda830c68534c2f5ade77fc295e0f503b449230e41360. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FRX201908871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fe9273c5874bae7e55df6d666195a924261e8fbc8ea23ab70b310c455971a5. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FRX201999434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b45cebdc40f553ad2d681cabfc82333f515a4b7af7d9fa40c1c803bb5af01d3. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FR10S2010243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2d041a03110a9ed3fffb293e0a39ca8ccdef8fe27898666be588bce9aca5cf. 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/FR10S2092939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2d041a03110a9ed3fffb293e0a39ca8ccdef8fe27898666be588bce9aca5cf. 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/FR10S2092939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f1a719cc4c5772b04fe6377a014062725db5a2559fc05d6ca1feeb88b8146c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FRX202066429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f1a719cc4c5772b04fe6377a014062725db5a2559fc05d6ca1feeb88b8146c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/FRX202066429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1141d628234695848d11822523e52e9eb2670b00b908c628023b5183375519. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX282019845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1141d628234695848d11822523e52e9eb2670b00b908c628023b5183375519. 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/FRX282019845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5758d391f87dbf34b8d1eccb6418c2551b8bd0f9a6008e0757d2a10aa65a1e6d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DELJ82069387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6267018b4df64aa99a205e0430164bfdc3b1fe459af76e03c1790b20b5dea5. 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/QM3DF2001682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb03f073a8f9d3969ea361a562e4c4159800488d3990bad8379a33b6f361ca33. 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/USANG2101560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8af45758b47413f8035801af14f56d636f96da28fbf617f74dcc3e4f9f64f9. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USANG2151351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49702754fb9162fb37ffb92d7973abced169db9c818ddc178c04618138525a28. 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/USANG2173722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0068aff9862c6f41e27d07a6960907240d218ac5b6bf8f6ac1895be95a63098a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USANG2192284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf326edec065abe41a2bc2c070520bb679f7cb23777aef1fac9d4484264824667. 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/QM3DF2101441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d81385d545c299e479943153c8805c9e9a7cae69f77113fc37bd59579facd26. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US3DF2246491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6e261493320b266b53c3e8dbe3aadc943e5cda58ff656e83b3fb2e8aeed50b. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/US3DF2258001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ead1166cadd533ef903d6ff99c6e45634130909d4b1daff3dd7793e56f3d419. 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/GBKQU2144242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7ab2fefce33ca510341f6dd0a3577dab81be7112088544a5175ae2f6b246b2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU2144250.