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 0x4d2a6b955d2d4816f1675050321832cb6c138b382832729052e840213ed167cf. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f80ea7b-472e-402b-a1ab-48eb81f48c26.json and https://artists.proofprofile.net/proofs/artist/8f80ea7b-472e-402b-a1ab-48eb81f48c26.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 0x83d48dd11e6e57d1a8f1745387238aa7f884e66328e04314e67e91132a6057f3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES64E2419383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3717e01530d51c46d91e2bc149590c1b31bb07c3b486c2a68645d7028c5f7e31. 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/ES64E2419384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ed98b6ad9a7ef086755a764fe7e2ffe4d340864f85ce3e3ff36db3f734e492. 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/SE6SA2424382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a832345b26609e1eb6022ba4b68ad926b56ae265be11d068048d9e0afcd54e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES64E2343148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188a16cfd1ad9d05c80c151ad57c4769c69eb4b447a958936f2c3b1c25c2cd9a. 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/ES64E2301165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868e7d10455307c48bde4b58df94196679b6f46ac40fcafb4ca9b37c676d214c. 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/ES64E2206073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b2691cdefae85c70626b44e06b5f536be2297d8193d5be3658ca79ba540eea. 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/ES64E2204307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3fe5940cafaddcee3ad953b409dd63c69d111073522caabd2d5cf71b0aed1b. 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/ES65E2100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767917fb0a925028b2aa44e77b076c839113e0b299d1961666ddca1b1ca7df6b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES65E2200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4effdf75a283cf3104711e7dd1522faf90c752564e1eddda9e5c23cc804367. 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/ES65E2200159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767917fb0a925028b2aa44e77b076c839113e0b299d1961666ddca1b1ca7df6b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES65E2200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856de3a17f47870ce194786a1b501ebadd6b4822100b823c123b728db6bbfcb8. 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/QZES82169294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3858a6957f129f7787343e09dcc413e9491e6648d73f8f2ca12c221c33e953. 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/QZFYY2167707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bf454a90a3870276320f7c4cc0f39a88859c165eee9cde8768bdacbdde99a5. 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/QZK6G2030274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9e7a9631a29d50d0ccf8ab63ba331560fec91f6c85660b1a9d9c17ab619302. 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/QZHZ52146950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f084212e08557de8e52e3f346a7e4d2806bf0c945644dd4f80443d2a65d721. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHZ52130718.