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 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 0x259b67ca1c7a0925c6bdc1975dbc609baa58dc6221f2bc0f8dedc04a4e4b8b44. 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/967e57f9-e2a3-429c-b3b5-30a38d23a481.json and https://artists.proofprofile.net/proofs/artist/967e57f9-e2a3-429c-b3b5-30a38d23a481.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 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 0xa5fdbbcdd83f2ccf50a1fa6b1de6f21129c374f176a851a1dc275e87bfb79916. 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/CH7812362404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa10886c0101f9a055359afb7bcb2e75cd51d4e336cd7f259c7719f1ffb533c. 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/NL8NY2300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4a0241fedaa8f2d00f1274771244406d9ccc360faf5c96261b97af7b88cf4a. 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/GBKQU2345753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b48699cbde562809c2c2003bb68499ca862aad585720f1a609db9d1b5880de0. 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/QZS652260964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40153e32fc58cc98a18e5397e1ccdfe6d6b4fa722567a6b7a0cdf091090a06fd. 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/NL9KQ2390121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0020cea48c1ae05e05bb95e95540aed0b87358f9b4e3ce69fb4d783b3d04e76f. 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/QMDA62296896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96d1610aaf130a36cfa4fc69903a2b5a783d2a39c6d1a1644a7f6b566ced6f4. 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/QZWDE2438246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbc145bde09988cb925e5289a96e02b0d911ed569d72bf90e1f58bb26a35450. 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/GBKQU2423677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa143b18aa3ee40591e16a9b277a058b68582a8cacd7093b73b6d7cabc9eb4f4. 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/SE5752464831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff9620394963ec394acbbb8f8132a281331d2cf4feb044a07c4329561c31c19. 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/CAQOI2408146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d113b74deaa2ff4e1fbda1351503e342f51cda93c6b461d00584509db235e47. 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/US38Y2412754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289344ffaec161c4ba90b2df536b69cd237e5bc90518075b4faf9ba424a4d35a. 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/SE5752464814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde725365b8e55c38597fe14c794bf18785e1d5ed1938d6389a9024c7941f2b8. 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/QM6MZ2429501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc917523930c2ba914f30bd6ff036b5c258d75d33b1fd69da21c0e7e9fdefb4ca. 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/GBKQU2401907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc3cf2b174063df08c3778742e6cd6deb35d4384328fd2f12bc67a4f5452a95. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USLZJ2438921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bd627ddeba2996f6b4e101e26e990fcb7b0b0aea5efe6e7e1f49db22042b11. 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/GBKQU2383436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187da5f46858b355668d654e4a59709a1e66ca14a6ccebe76cbd19d852c36464. 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/QZWV32342109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36c6dd91107fc8768356a1968d544e8f7a5ba3ee6308954e93eb003667c54d3. 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/CAQOI2305769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e49c3e5c918653738610c996aec277519f312ecf3d1ce83bbf903c68369f33. 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/NL8NY2300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369933371b4bfae74c002335a5c5b57fa20dd05f88e091c1157764aaf7190531. 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/GBKQU2383237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae6927618b546d80a0c558a253a50c4901b4ee01d95e53efbebe69de26f5e6b. 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/GBKQU2382464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f732cf68699e4951337b8f1d8862c399832ec9e720f3ac7b7ea47f39b39ea31. 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/QZDA52361241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d4e54b12f5096cffe470a48fcd8b34266d9723e407669fc62588c06c29b825. 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/NL8NY2300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8212836c726c187e005b3c5c8b28019bd48a35ea36848484579434f25276f1b5. 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/NL8NY2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3168a54f9a6b9428267be20e67bf242def3e8fb414b97efc6d988619cb167c81. 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/GBKQU2332513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf372c9c2368b6b4096a75bcb2ce6844d6be449dc5e01dfeb2b927ff3da51c292. 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/QZS642378164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb236d1eca1decf1088fdcaa08804d45ee99c896c0a3f155385637a7808230207. 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/QZWDD2268513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97a2d9763e07db2895664b135aa702a1a7b3512feade3539de7ea76442740a2. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/NLT2H2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f3ab02788b0e3aa897a6c2538d3d14d6395d589dafd4c4e2484a0666422afc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:17:10Z), 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/NLT2H2200789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001ab28e8c5d8339d8890579b7ef3c7147d0461cfe5397e376ffa55f5dff5390. 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/SE6HN2415141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfef753fd378ab7bd45c32d06df487b7c096b68f434f3cf948f0eb0f17c3330. 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/CH7812405043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d75c162eaeec2038b60fb77ccb863e79985b73d7fad6cf7b531a43f0991c051. 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/QMUY42100129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409aae6e64c7516d025212f05e64ecccb20155730bfca264881b056c2cbb11d4. 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/GBKQU2104379.