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 0xb2d80a868af79caed92635ec789ad5859bf0dfb87792ded89d5e6ca16f4c458e. 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/72e0d8c7-d907-4935-88e0-95d16722de00.json and https://artists.proofprofile.net/proofs/artist/72e0d8c7-d907-4935-88e0-95d16722de00.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 0xda8a52aadcb537f3a5d2c66229a95805644ad0e5d0092fe705aa9793765ae1bf. 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/GBRKQ2404085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf697262ae535e3cbda11d7b160f14f75f3b1f354e382b0af45a06bb48abd8549. 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/GBRKQ2404093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba3fc8d840c649be9fe5ff3169293f4f90c3d91e2d556ed77e1601da1feca9f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBRKQ2404083.
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 0xf1f2f3944a06c40c487af17c56caeaafa138f9a67b30cf46210f1b3e0ea27440. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/GBRKQ2404086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df1eb1c94267db2dfc22854aded857d7275ee99aa2778ad2915784be2cd07e4. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBRKQ2404090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558eeb8b7ff114bad92fca7d8f64ce28ed1409697ebc5c5fcfd2e6f1d18c77ee. 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/QZWV32444744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d336c67b1133d7a3519b345fa587391cc54fc07bd4a157354768dcd70096e0a. 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/QZWDE2487295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc962911ab466247cbc02353a429332f4d8ecef1f4cc1607029d6629dab7cce1c. 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/GBWUL2404580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5299ef0b48146ff155e83c17fb71827db80531b3a3a82c6719b861c3bbeb62c. 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/GBWUL2404566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbcb8486260da27dcc02455470bf87c34ca983c51ecc74627d9bd792f1ec49f. 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/GBWUL2404563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a505eb22f96600b57633bfe235ee43458ed42f79fea0c477dac9b59b9a7915c. 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/GBRKQ2468098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc328044ef50b8cba50692d87317552a1d93175e9a68ca8da14e44cbb8a6fb9. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZ5FN2446616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf696bb90edf8fb8709ef090806eefc23280ff60dee4e567c139c81bc563d1033. 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/QZZEC2311368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05ccfb46a498897731c26757141e26318d3320f5395c45c7be2335d900f1e91. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZZEC2311367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43444eb609419afad7ac95e0097933dca1443abfd4a5631ce1f084ae3ea327b. 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/QZZEB2398733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0a5737e9d3216af7caa954869cd5e03eb9517c11a666a3f22b4f8039da3454. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QZZEB2398742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060c69bb7aa3c95e7737a54112760c45673083471314002f2cc9dd1e95a28a55. 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/QZZEB2329846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe353f70881db9a8019ffdf1952a7a609fadeba28982f6cdf9d2f9df853d563. 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/QZZEB2329842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38db46fa1b1ab23f786a0b870a89e37ee3f2ec3ee23e0c5ed834878f80e86474. 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/QZZEB2304311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b84b9913d1945b4ae3696ea70e73ea873bf3587be28363bed320b0cb8ac6e93. 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/QZZ8B2316443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaab9b547477ab8334432f8b4997982de9d5e17e7081e58cf4e7dcb9c2b77cdd. 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/QZZ8B2316439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05b5659e8d4f052ab550bcf14839ab32a06006ff43f052a8806afe9859cc207. 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/QZWV32397357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a96c72f6eb63a5d5e24c177dbd9809f6e5723bc5f81f35b9ae4cf2600bfbf9. 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/QZWV32351772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e5e6fe2908af4ac1103e7cd3f76f0b45034290c19068a3dd4e5c14a51d0134. 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/QZWV32321376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80336ccc913aea74bb9ea981b55407ac928a1e8b90ac195297cefd37845ec1f9. 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/GBRKQ2231259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bc37210eaa22e32f4aea922d6c556c18ea4f7403c0feca797d6cb448f51cf1. 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/GBRKQ2231290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ecc1b4113980191328b9c05fde104e99b67fe4f7ced76e83f9dc4bf5021ab3. 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/GBRKQ2231291.