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 0x8bdbefa889b480da407cc44b0c55d0305cb6c6355e4a6d2a594e07ce9036136e. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9565bad9-e59e-44f8-a2cb-2d0480d62ef2.json and https://artists.proofprofile.net/proofs/artist/9565bad9-e59e-44f8-a2cb-2d0480d62ef2.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 0x7c36bf93286d396a66a73f077e83b4f5948f1d961e4fe4daf54bc1d315c6581d. 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/DGA052014971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196a8818a499844351e87f58429db7dad91c1f2f712d3ff2186f79a29acbad73. 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/DGA052014972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38587d8a0d63e0d22a1f077c0fa2355469b9976d66708ef0544fdbdcd84d7bac. 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/DGA052014973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87327dad4ab614d29ad57dda64e61622534149cb4acbc1555129ea8f5b5df74b. 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/DGA052014974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c87820e9d0d6882adc1451b07b015db30cbc1c4fbe69d062b30be59179ef39. 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/DGA052014975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccdaac885313701d8092cd6ef850aeb1d3f6e8f621f268d224907f531441f16. 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/DGA052014976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e55810c6b87fa34f7701228a62ae797f12634ca9b864b9a50469dc59023693a. 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/DGA052014977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192d3cb3fbbe0151ff58c8d31f40db0d550ae42bf7e09330b8d5a49ce0cc6de3. 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/DGA052014978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43c1370a225f3aeedab5c4d042e2bab3f5b55953fe59749e248aef14cad2da4. 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/DGA052014979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725a1fc4267f95fce3b6b5f505b511ff6406703fe6649dc32c5b0fa60e06ae8f. 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/DGA052014980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b17d2ddbdad05f3fdaeb465802a76b19810c527b41d8be67e63ff839ba056b. 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/DGA052014981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda33b8b6ebbec1b76f74ddf8b632d0f531d424c95e30abcecce76ca419395f02. 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/DGA052014982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffe21f73fe8b0975890551285576907aa87fea2c8d65fcc1c027bd62a4ce4ca. 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/DGA052014983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fc550e7c2d91a73974d680da498da8ad25b868cdbe22bffe18a93efcfde4a8. 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/TWAE32101218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eacfbf066ac52f0087bdb7fc5669f9a76d5289fb33421ab24683f80895ad7c9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWAE32101220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee70d5290a46b58ae8dd670010e744e6d1bbfee6be4aaa9ff7bb5885873414c3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWAE32101221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f425cea96c18241149405239a46732f69d93c5ca1094d10d345295448a637d8. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TWAE32101219.
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 0x58faee97e9bb9a2fc297a20031cb75557b56f4b8ff43dcb3df4a49647fb96562. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/TWAE32101222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2445752a334e8109ea4f3e6b41507714ad1782e9f7b778975b5125bc7b746d60. 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/TWAE32000623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20310780b775a37741a749c76ca0c7fa8425094d6e3e2e681fb25d9ebc32bdc. 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/TWAE31902108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bfb6ed0425c857b4734346bf0586fdc5796ee83a3d499275e1d5c9559d9381. 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/TWAE31901178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee19935afee2d9b8ef3e8d9f935932d1e663b1d554fd52588d10f0474efed86f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TWAE31901179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa02e6d351afaff801641440ea56103e41874e8eec2790ef80ba39da9c20b01. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TWAE31901177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2127e31c192ff2785f0c7ac2984e392d607733afb648dca0f0339fed0a4faea. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TWAE31901180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49ea71b19010543d94295f8d33c286473700df05fa2727cd07c8e29010e56b2. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TWAE31901181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf667dc0a901dc74cb7285bb421eefe297540d415b7b92d90912902f6b17d6b8a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TWAE31901182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f0b266b377759c5991abd7e9b9dab9cd6eeb915c00a3ba0c2ed8b311ae2921. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TWAE31900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8551784bc8aea4e8fcfc35a0604f55d202bd94bc1835dfd2f248f982248d979f. 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/TWAE31802454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fc0eca8c75f447149ab38092d0d692eb9fc6d26d27d8f969cc23df9495986d. 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/FRX202599246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d5c0c4a5770b965dbf6e4435f879d2837ecc146f7b2707eac6f35384b05132. 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/FRX202599247.