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 0x54f90883888d2d0d7c3d3a3cdddb580b180771ebc8e492993c878591ca70df4e. 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/74fb68db-12e8-4dd2-87d7-90d2d809d6a3.json and https://artists.proofprofile.net/proofs/artist/74fb68db-12e8-4dd2-87d7-90d2d809d6a3.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 0x52d88f77f2caaeb441fdca7a5b20f783cedfdc2e3a6f7510ca23ae8a3011064f. 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/NLG661800554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563b870f05dd87fd79fd6d7ce5b440d61ccec201c17cf175b4f492c0b0c1eb25. 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/NLG661600690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7af14a6e91523135f73406de1991c328915e730eb5db4c7be754e975a53a744. 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/NLG661900478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d676fec3846db922a6ab4e055c1a382268a0c3d06ca00a91deee6a11479f228. 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/NLG662200262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdbe2afc3251af5778d5836473c106fb29a26d991691cb3f1e8edf963fbe35a. 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/NLS241800299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde679fd5c37ae65b98d585171f1fab31ae2a286464c66b5c044f4be2a403fc9d. 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/NLK2U2000384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d88f77f2caaeb441fdca7a5b20f783cedfdc2e3a6f7510ca23ae8a3011064f. 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/NLG661800554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920898cbba66e6e2458b5515a063fdc2a3bbbbd3d5d6f597ee0306355f6bdd4b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLG662000658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa223776e75867ab0e36c5f9fc1edefc476c7e65a2f6ff32d097a8f1b9f67d484. 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/NL5HJ2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb74cd8eb23c063977407b7422a332e04d5aac0c5e4b24509f4e5fd93f79232d. 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/GBSXS1900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb74cd8eb23c063977407b7422a332e04d5aac0c5e4b24509f4e5fd93f79232d. 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/GBSXS1900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c8dbc84955ae7bf5144399af78cca28fb259e95baa42e8a5dabe8eea4ed323. 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/NL6JV2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9fd8eae2058f6cce02696531c69d426dd53b2655061dbff2b8138c8198777d. 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/NL8SP2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc7d16c965dd5992c56a8c1e59b635fd1f4766e8832e4fb320d11018766adba. 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/NLG661700933.