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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a83753db38a7f9c6911521b92fe84c0464378e3fccc9274bd7478082158074. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cbf1743-efbe-43b1-96bb-0bf9e524a26a.json and https://artists.proofprofile.net/proofs/artist/3cbf1743-efbe-43b1-96bb-0bf9e524a26a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12b103786463111c00614722c30b5cce1e10cc943cb2d708fcd651bb2b66f6e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM22L1900396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0c54f8ba745dda326c543c931d00f019841af27b135ab63d4debd0c3940b33. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ES71G2133666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fb694a5038cfddd9449b4494513ea5f18655dc02bb3fa8ca64dd75634d2987. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM22L2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c0418e2b5802a1c93701172e888a94d34ed3902b353ca37e1eee52c19e0094. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM22L2504901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54c37f4a5142d9efafbc7e0e2567e71ed780015f50b3bd2932beb1611787526. 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/ESA092507060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86a1eaebf4ea3f68f6feec83be4cc17669c337108a182ebc9b338f8d60bbf80. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ESA092507775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2563e178e0ee7cec0208705bbbdc9dbb68caedca73c329eaef50dcdb84182b4c. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:04:52Z), 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/ESA092507776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e64b2564f23f02e72f2989fc2b44c4f9dd0a78246490b814230b5ef06de65b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ESA092507777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adf780ef35f261f31b66bae3aaebc71ae889897d620881a06f19248acde2009. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ESA092507778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54c37f4a5142d9efafbc7e0e2567e71ed780015f50b3bd2932beb1611787526. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ESA092507060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d09cbbb4d4246c402c06d08f3fce6ed40fbbe472789130128d4927fb3074603. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ESA092507779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e976825601b91955044d7d458ddc6355399ba0743aca3f4cc32150e42af0acf. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:55:22Z), 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/ESA092507782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab693cccbb7a2d539fd9297e83c1bf3b37cc1671689c7bcf146b8a901a27bf8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ESA092507783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61aa3ae0d72d1fcf2ce7fdb513f015a6a7d1aad994fa24f8c090fa3fa41c8567. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2415210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c8ad3f7efaae01a1046f37d920d12d3d9a68339a83194bf31fde39a19d19ef. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2318517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b00f73d3bbe23f58f865eee5baee17ae712fffb827a6c77051786dc8918a50. 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/ES75E2204660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676806ca7b4585e0d53c3ceb09d8fa583edf7c57242839562d54cff2e163e569. 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/ES75E2101164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf9dd40ec9971d9e05ca6851267c314cdafa1b421d7e122c6a1edc7656edf02. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BK4DA2319689.