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 0xf2b6737b0e2bef091991eaf311ff7e2d40bd56ec2f94015ce2e56d17309db8c3. 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/501fd060-8812-4995-bfd4-774d6f768af5.json and https://artists.proofprofile.net/proofs/artist/501fd060-8812-4995-bfd4-774d6f768af5.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 0xc5b189c046e986388fef002a8146a3bb2874787383fed89c2b104ddf5f328406. 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/CZA232100397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64098b3ed7a0a00bc99028af03efb3524dc7c70761a993e8addf57793100c5b6. 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/CZA232100398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddca86492eeea8d697af556d3c980dfae7a25bef8b26a492a82413fda4559241. 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/CZA232100278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc48d1cebf687211d6240e1f378f3637bca3471fa8f6cbe8349e5f0541cfd5fb. 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/CZA232100399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7786c69c2a3bd71b3bc71ae98821f13af3d769c3ff9843c40fab0b326f2305. 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/CZA232100400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9632bf42cc5a6c0aee3cf6937c061e7bca14e8f332c0c969390320628de3c449. 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/CZA232001249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2698c9d3b059f06591b5d8d44dbf164d306709ed17f350b2f72111aa050e6453. 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/CZA232100401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d9ff1fad2f5b5efd0d06fcd20c9abdd4ea65ef3719d44e73f28085d713776c. 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/CZA232100402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a172a7ccf4f6804c5c580e56f2cdb014c9fb9198bf68fb44a27a94363b7bb8. 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/CZA232100403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7980b10eabbceb6dd7c465e31f17ad6e7b23e95274fe5e6a43f3f2f20275c843. 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/CZA232100404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d60e8b2b57d106a01db4cc8334211b962849a8612a4b61435d464650294893b. 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/CZA232000675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe1ade3be7f2c344afeb81b98533a7d7125c5a5c60da25c56af2195b47b0a45. 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/CZA232000676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19abb4533e95c25c89671d340b31b927f653085cc1957add849c8a1bd7201404. 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/CZA232000677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6368543e5212d917a9ccb3001ee3519007b0320da8821840f3eb7a3206bba33. 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/CZA232000678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a31a044b146d4f175d4c9adf26fa278568797325ea4adc7746f260afbe5e471. 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/CZA232000679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028226a992230b1116725691ebafd5b37bc5cae40f00d2a34374cde143a938fc. 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/CZA232000680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc461193292c037b14009f024833ed7aee2df2545c34dc123deb8383ff26ddd5. 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/CZA232000681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e3c4fdebcab4406eef3ef7b09f9b74b66eefad91603130c69dd93d53acff4a. 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/CZA232000682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91814ec897ed5c185b3f140a74e61bdf5502f00e38fe0156843700f24a5fe1cc. 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/CZA232000683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a99670f940575225c47602d24b5a86f6be8ef6229409ad5a7eff08474d84de. 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/CZA232000684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4841da8b61a24df8d54e68ec3a9959e1fc47ca6cb3fe3bdbdbe76d7ee79a103. 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/CZA232301472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddca86492eeea8d697af556d3c980dfae7a25bef8b26a492a82413fda4559241. 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/CZA232100278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9632bf42cc5a6c0aee3cf6937c061e7bca14e8f332c0c969390320628de3c449. 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/CZA232001249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec8d40d0c127b39f887622df82f79d701a4682436ad811b29d1bb69a432e328. 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/CZA232400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ab2864bc5065ae7fb5a6e62493ccd77daba8246c3186d64fdd56cd1c318cef. 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/CZA232400405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ece84fe2f9f9bfcf3d0eec8dd824924a4095707531dc62a71c0e2de209b5a9c. 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/CZA232400349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcd4fe487a2f7208d445c5f2aa7d433b265bcbfeb8f86cadb9a11c207cdec8a. 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/CZA232400406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7b960dd0f3e0bf576efbb9e25bef7f79230829544104f6a1559150e4835cc0. 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/CZA232400407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd709b7f9337381eb8e654ec903bd442e56801b3700fddc354ec2327e67e762. 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/CZA232400408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1aead940a42b999b59ac5fce4c6f8e8b87bc3611fa5375889d5730df39ef332. 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/CZA232400409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3cd51c8256b6e5a35296e0df56390553da73b1c8886e2dbe50491b210b9e68. 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/CZA232400410.