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 0xd9e9f36f3f896f0a95f117fb431d40d3d25246f6f166a1455d8b12611e03212f. 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/d3c870b5-0d44-4949-8cdb-5db5094f99ce.json and https://artists.proofprofile.net/proofs/artist/d3c870b5-0d44-4949-8cdb-5db5094f99ce.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 0x761d456e9bbf2c2ffcfb2c6c5fc0d4645b8f654fa2c57ede59b362399528f951. 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/DECE72500236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb14106a90c783f0b9ea3c0e2ee9a3f3ab0c1b31710eb85e1125794f033adf14. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEYF12300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb14106a90c783f0b9ea3c0e2ee9a3f3ab0c1b31710eb85e1125794f033adf14. 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/DEYF12300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e8222d73a5331f2b56a686675a1825570a2c56de5c3d51c16d3fa38025c5d3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZZ52170363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a38d438c990af2b560476743b6243aae72e1c69863f0c607fc4203975bc88c. 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/DECE72401796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc382d94be5535fdd5641fe5c483c722e482f5ec4ee5e40cffda6aef2b06143. 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/DECE72401805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee9c566eac9f74c46e88e2afc7512e4204e79e52e2920fd27b30412cf7ca895. 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/DEKF22401114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0e935ce54850fd2e95b7b8d5254c5cf183b084116974c0b331cb9c8b5ee5b9. 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/DEQ322400238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4fb57ddf4204cca8e38db5f3c8d5c7472825e0c69cca0b48104f31c05cd606. 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/DEQ322400239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e366c6f5107adbc2fbd669d133aa27ac803bf7da841528df140be7babdb4c4. 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/DEQ322400240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f85abdba6edc07460cd5f24de19c3986fca9e557cf97367bd86f02d4742e82. 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/DEQ322400241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa489359bc81cf99caf8dc7763143b241057c82b4f0146ccb577a0a7b15de3f76. 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/DEQ322400242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ad85d41a1332c1ad0f9e3d754d3af2a5d03f85435ce78bb3d6468683133a60. 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/DEQ322400243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23177f016361676c71f8fb2af142a3c826da5b9d49a1d4ba585773c94015e07e. 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/DEQ322400244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8c589946392524c62f6d8f2a61cf3d1b41b1889dd3bce75a90c924aed11d70. 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/DEQ322400245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fbf45a16126ccdce5225d024366fcd593a37dbd4d054c85faef46626f44591. 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/DEQ322400246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473f12452d71b055e8290b4725c92d40c539005494264a1767308316bb05de86. 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/DEQ322400247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430ab1f95fd510e87ae424b2b7de6e8557fd55b16b0b0733dae3bc965b8e6f9b. 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/DEQ322300552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63c159bbf1b0c084283d186c6461754fa284d37e3c2e3ce4a04c2b5fd465f43. 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/DEQ322400249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c889fc5c10e6efaeee760578d15b95f2c39de3d8424143310d667b5678181d1. 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/DEQ322400250.