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 0x62873a8cc7bd4070f9b6f6519398480404eef4f381d1d76fbca345fcff93e175. 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/715c5151-2f40-4605-861e-47176e9d87e7.json and https://artists.proofprofile.net/proofs/artist/715c5151-2f40-4605-861e-47176e9d87e7.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 0x101409c5d71a8d2c886bd2641c36c07c0c33e158064cc49358565148087d5505. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:11:14Z), 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/TCACA1477573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d75508c143e773f745eb2cffc8452a8d2137194658c0ca274653a2d6da96e26. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:00:58Z), 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/TCACG1518945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1836d8b24ec5e6b293946a06777dbfd840a27ffed44805af886ac9b03f117b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:25:05Z), 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/TCACY1752374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc8f76750408970bec3b86bd5f75f162e7cb4d0b689c846758062c67a1e225f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBKPL1786845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61de984b2af77a4fbadb6d1ffbf58672516316069c4aeae37caa1f99ca17ae88. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBKPL1971692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf935880f4a181918fe5c219c72662d9bde3216d7200b12eef2e7eb490918b9c6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBKPL1947016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424bdad3401e64620139c47c6adc2a6494b2aa77bdc8696ae0161e24ec11a395. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:59:12Z), 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/GBKPL1962982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b04b032dfc6483640ee7feeed333b5ea5257a215dd0bf0dfc21c2ad8c4f1900. Chain 2 (Bitcoin): anchored in block 957730 (2026-07-12T16:41:26Z), 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/GBKPL1971699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb5c9806452924bc175bb4cdf564fe50f5856690d2089bea16024f41cb25872. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBKPL2026307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3db9f448fd0e414563b90653cb798037b238f89910e236a3d8112e735f069d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZKDK2171426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b1a9f732e91fdfa25496ca32a15d5c56fe8a1d4f9e868a1d813a0f706e585d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX3HH2206327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5565ca82747dc2fdfd805b20905ed6363bd04a69e96ba0eda572d9766cf5a8c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM4TW2320276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdd2956c1df52ce412d2c28f8bd2074221327a212ff021bc572f62cda9ceaac. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TW2355254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5565ca82747dc2fdfd805b20905ed6363bd04a69e96ba0eda572d9766cf5a8c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM4TW2320276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdd2956c1df52ce412d2c28f8bd2074221327a212ff021bc572f62cda9ceaac. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM4TW2355254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10bfa5f8e53f940c3279d65cbadf3420c82b914a81178ab23b8c64628a12e4b. 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/GBCRL2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdd2956c1df52ce412d2c28f8bd2074221327a212ff021bc572f62cda9ceaac. 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/QM4TW2355254.
Indie / Pop / Folk Compilation: March 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5565ca82747dc2fdfd805b20905ed6363bd04a69e96ba0eda572d9766cf5a8c. 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/QM4TW2320276.