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 0xf21f2cfeb392e5fac6c0f11b360fe554b91d5630098e4dcaadbfa7caf7d15a3a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a60346fb-bda0-4e86-b117-5ca6cf41d0c0.json and https://artists.proofprofile.net/proofs/artist/a60346fb-bda0-4e86-b117-5ca6cf41d0c0.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 0x65c67206fb33abbf04b7e01e5edafc76ba76aa7f38289db63665dde8ea75cc94. 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/AUUM72300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1542d0f7844145648eb23c1c23b7baf9f28ea71cef3f7d8055e7bfa21d083ad0. 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/AUUM71800175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c67206fb33abbf04b7e01e5edafc76ba76aa7f38289db63665dde8ea75cc94. 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/AUUM72300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133100ef2b6548f1794c35a13d527d3b4c06b0da6f9c7f534aa50e642f76142b. 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/USZ4V1900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571dded5f31a65d3db7fe71f1310e903b3266b2fdcf95e030ce0c3ae84923d22. 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/CA6D21900365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfb659aa133824ab1d9e32cca652f9bcf819964dd207e4246f6dc9e00458c08. 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/QMUY41800229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36684edc0de60dc91c0c188b05b988a7aeb06f2883d6632f00bec400449661f2. 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/QMUY42200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8336ef842c33858db7cd66af2293fae5a3644bd5c662603a7e1bfea876fad15. 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/QM24S1818482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a227a6fee80a9a94cc2798cc289df92ba7a8845f4cf2c0851532ae72c605f94. 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/TLVEM2400255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa89340857297f58d44a4ecd0acbb3413c85c347b6c4a9e2847fb41c6851eede. 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/US3DF2079504.
Chemical (feat. Ahsha & Lemay) - Hex Cougar Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004ba4128a856542b4511aa5b0e1cfe1cc4abd850c26eda6c0b9717472b5d74e. 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/USDM31800301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa89340857297f58d44a4ecd0acbb3413c85c347b6c4a9e2847fb41c6851eede. 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/US3DF2079504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d13a42b11d90c03ba11049dd5c552a116eb4300af57fb9f67872444e947e1ee. 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/QM3DF2000397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eec94add20bd8c13cf5162c2d9be856c5f2cf66b2043d040a48cd05323e3708. 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/QM24S1701123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cd1db97ba59a04e15a4b78b1728dd0e3ecf1100c3c74c4fff25749e475d679. 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/QZPEW2459492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee515f36365fef7bc69e0f6ee54e7d6e3b6bf622ee0d5476a0f6ab8aa7e0dd7. 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/QZPEW2440073.