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 0xd2200b9ff998c09bd5894fabd15495422c11c6e0e83d333fe1c79433c99416e8. 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/f859be1f-c30e-4965-ad29-68010a335fad.json and https://artists.proofprofile.net/proofs/artist/f859be1f-c30e-4965-ad29-68010a335fad.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 0x7b8575065bf28706e6bad250dd1577cbd695431c00f0565ef873b828a56b87cf. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/MXF551204759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c36071971c734c8fce89dabe1a92d4405249fd4a82184389bd265cc3f549c6. 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/MXF551204760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a5050a5d1db4089c564f43d02aa7894463d2141444818c6cab3076ef0e0e90. 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/MXF551104481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e4ec2cf87c98d0aea3a2a2f1e1e113889aff7922db6f21a4a79c0a90dc8081. 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/MXF551304984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e494523e48b37f993b300bc72c4baaf5ccfd5f2859165d2e72bacbe416ec78. 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/MXF551104483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1be817449ec8b87471685411c4c72becf7e00a9f71ce00b46256e3572502be. 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/MXF551505188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f500b9d69ca0e000183ff1e32c967b3807e2732cbc57f71b17de38816e2baa. 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/MXF551505196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caafd313be46654fa9808ad44d5b158efb0638511d59b632948a8487819ce2e. 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/MXF551204763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36088f0e4a9795974608a92fafbcdabdeae93c871cc60ff4c79c6e651043680. 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/MXF551204932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bd9c969e7ba5c049416273f2521ec349b54c83d979fa2691f18c07ae3ba4ee. 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/MXF551505186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0b84799e57f3e05d23c7b522af9a903ea28b3ef6ebe93744897e99d4d0cab8. 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/MXF551304990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2399b6eae98629b2c2c6636f603173609054afbbdf2381e80ad42e19d7b0bd51. 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/MXF551505193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1273dd5ddee1cbc14cc430066c6b6a458c9194e7b07ea9c62e6cf5a0ee17d353. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/MXF551605376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b6ea874db914421321286c96ff8fe933944f2b819b32bd885fc635e4a108d0. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/MXF551605378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a442efe3b96334e47bde3003e818589fbe48899db26188f130cd95f6cf74a8. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/MXF551605379.