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 0xd88bb11e7ff32f91ff1f22ac02b3617798f6075f61fa8db3a4b661725c3c2b66. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e672ad3-d0d8-434e-9996-02d7fd86b1e7.json and https://artists.proofprofile.net/proofs/artist/8e672ad3-d0d8-434e-9996-02d7fd86b1e7.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 0x08fa675d4a4db428bdacf54b256013687a66da0c0a0cf2691e0db28cd661276c. 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/NLUL62100043.
Tu Sei Pazza - Whodamanny Reinterpretation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3038655e892119baf2ec3f2003f2c329de965d8454bfbfe50d9124831f924e9. 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/NLUL62100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e3324d02d687fb05200ec3afc6037a858302e64e50b001019d95f45b021f5b. 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/ITC972400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889a30ca9f885867f3f4726dc4ed6e49e810e0a736d1abd426b9c21c543f664d. 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/ITC972400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dd18967334e8d10067ce729b3e430210563ffb29b5c585216d601477729ae6. 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/ITA642300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd6fd09cc5fa32946bdf6cc000e5288860f167678f259cbee12a919a52ff86f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITDGZ2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e8b396de4ce5b9e7557a976e7c946e06d29baee38bc2bdf13b2a7a274ca5e1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ITDGZ2200041.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6881c4b5b868452460cd3ba38fea0b9be7cf0f99d4c427e6a881480fbae81d. 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/ITA642200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579cb6365b6b48f43e78ad1d7c057065fce4de96abf98bfdc34c43de6ecbf01e. 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/ITZ332100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959e5fcbcb7f5073b8641710b8281804dff84eaa8e250445fdd66464797fc22a. 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/ITZ332100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb87e584570f52f3f9a3634570c4c36fe564150eef76e5123bb216c362b2b02. 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/ITZ332100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b47f68e46800f23f60e85acb19bd245bf498a29009cfeb8b6687abc253e5e9. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ITZ332100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2457bac1faea65c67e7dbe49b1e7c85aa75a4993e6e1d7fbb212355b801833. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ITZ332100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9bd8e1a2284145567faab9db74a0409f4ca93e459b4066318b9d8d2b992a3a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ITZ332100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eae86d7ec3ecb2e2e6dbab4452c7b09165a00549ecedb94cb785ceea207c840. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/ITZ332100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e185df329a4e6e78e1a29b313416f57da2c53237d5f44f0f0ebc56b2cf9a281. 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/ITZ331900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bce4b0dc3d6a7e9d70d908a212fbda1a471f4dec0797291617eb7258dabfbdf. 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/ITZ331900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb04485c99ff1f5acababfecc2b57955e43ad3f090e7d86a583a1794315f8ad8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ITZ331900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fe034e830a9f2d23f96a10df9e88e92b8e2671593027950007c2e0134c78d3. 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/ITZ331900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4ec8831120b952a62e72dadab591390b77667a4d02cd7b058dd517223ac43b. 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/ITZ331900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00be2f2e1d98a36d118f2a1ae58806d261cf8a4fa152983abc1a0cc8a0d6cdd. 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/ITZ331900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea28c91e35e89c3b28c3bc58efbc56cbceda262faef110982d31ace484934b5. 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/ITZ331900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d0c835f6b87b76b709c1c85db216dbb6af65b93a2847f4eac979c5bacfaec3. 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/FR2X41962832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093e183d45708f1d12c9a3abf362fbf97911206923111849f3133260af3ca846. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FR2X41962833.