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 0x2cc9435e9fae16857cbc9c1b1f29deca958cceea1236405f2e19157edea6c1ba. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d4ccbd6-9949-45d5-98ea-b5ecc8691f58.json and https://artists.proofprofile.net/proofs/artist/9d4ccbd6-9949-45d5-98ea-b5ecc8691f58.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 0xff57203f70069dff25a3fcb90f30a673970cf0d741391c240b458a86679edf31. 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/HKA610600131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21ec5efafd7dffbe3bb1989dd1845e08d7ce0b5930fd147d6b194bf65430b4e. 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/HKA610600133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a54e6fec0d5307529abf7b2a8f23caf749d4b5117a780eb59c1562ec20705c. 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/HKA610600132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4965700f8f43a5d59b04a9e6d7dba0864ce3deb5b7762422f176cb0132ef1407. 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/HKG079900402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546c9deb0bd216c74eabcc2b3f65ff909beb9434a7a397788940656e8ae974c2. 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/HKG070400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c34a2dc3ee7eace223ebb949eb38fe9c2126c569ad7da775adf3a084957196. 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/HKG070400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9dbea5e2fafffaaf7853a05b9a0893cf01bd92e0109f2a7fffb30007f3ce37. 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/HKI498723101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515033229fa310c57ed121b7f7e5513592ad57ea513dd62fc691f86e77762337. 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/HKD048800805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd685f27e29664bf65812a99c3c97d886b040f4377bcd9a2a59688f1c154e5029. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/HKG070400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8690f4a034a4c56448f6820321d24df6b31b1afaf4c5a918a4b9b99ad30278e3. 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/HKA619900213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49012c6d894b922c2bf6d1f8181e328256cd2733a4b76dd210e5de2d65b49e4d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/HKF360605005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4533be324662643dbc25674af84580dc430867e9b4f8b28a5827d733e1d5986. 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/HKA619900226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e79001f2923ad2d8a2de8c649029a966801da3ba3f690fb9deabedcef18b2d. 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/HKG079800089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd545971eb27a01a560ad7cbf1f58de24c9192f95f1d25daa6addca6b14daa6. 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/HKF360605001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd377e5249181505be2ab6b7021d34a03ad828e040411c9d0edb97e51f20e3e. 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/HKA619900215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a75d19cab1b03c6263f825f22b4765cc97ea153318085c58e15c496e1ec2691. 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/HKG070600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299a9c4bc723364712008876f07ee3fa350ed77ecb68d98a5a06d5b04d105c59. 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/HKG079800079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd847ad5eda27e1392586862de2ae6f8b85333e1a2e5deddb2c3c34788c9c8a. 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/HKF360605002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f2f281c026bb12cdb33fe5678af4e41ec6b131fe889c814f02eb94654babb3. 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/HKA418800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dd16729b4180d414d48f2ce48f8c5c127a0424a4deb4d6620a1eea0909d52c. 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/HKG070600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e11ec0415da9dd9b68d99e3f4344127a39cd92c26913202c5e13ae59f4d2a4. 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/HKF360605003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dbf0733f39cad3fcb0990ade87b04e8efeb403466e7ca924f792547450b0cf. 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/HKG079900421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b8efd64e8bad66195745c11f67c199183998b07be1cb9e9935a0e5ccefd6d7. 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/HKG070490028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1ff5139c522a77950e4297e36e11a23470cf16bc266fad2714f2175da3a9af. 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/HKF360605004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26858d1669fd718c97577e8709798d8cdd202d941b140a667d77c2e5fecc3174. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/HKG079900377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ea26362978bf1d399197afe73190c4df7398c146f6da7d2ef7206b24944742. 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/HKA610100285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a32626285aa5361b7b11569faedf909dddeedd208d96194cb87297937cda118. 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/HKG070400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fbb1a20ea8ad6215706de210824c0a4268982fde444792041d870cf8ea4d3d. 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/HKG079900375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e29f544dc5004886b8d23df35d356e44ce18c23eea79ccadca4f8fd0f9a70e3. 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/HKA619900228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fea8c693124aaa6cd02e60b7c78f8952335e7f9bc46eb7d9664ad22cc887ccc. 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/HKA418800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75222a3e0e30fdff6b17610fb623afdc19874754dd6adcab2e509de84fc04708. 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/HKG079900415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2641699cff2b2856331cb14db58d20fd92ae1d470b2e47770ed2b4c6924b4238. 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/HKG070400048.