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 0xae56975419f2082c18f6df916f702f447d91b353093da8cbf8e74f0df0377c7a. 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/c464110e-31a3-4298-9619-6ba53e7c7284.json and https://artists.proofprofile.net/proofs/artist/c464110e-31a3-4298-9619-6ba53e7c7284.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 0xb2933393e8ed3bcd70a45b016dc30ed549dc1592174a2d5967dbaf54b26afae5. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/COC017913021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe8493df2c8b0ac3d9da984bfacb2daceca3b38269f8ac8ebc8bd465964ff27. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/COC018114917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017ee2c88584f0a875b4fae15358818a1fcf52fd682632d08c5e47b18851fa90. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/COC018215350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda35ed4da3b70018e84243836d94170e5bb9498c6b249c4b66437377fb2b48c. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/COC018215343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb067387d6248c455bea3b4f5c92d728af315ab2663e0cc0480740704c958d062. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/COC018215348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e79ad22fedce8b58fb11c6425354402b563cdd5745121b6c5ec718c008ea410. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:57:07Z), 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/COC018215346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523f744e8ba6770cafe638b16c43ab305af51784f41b3de524ab73de51071df6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/COC018315787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520aa3aa97474ba237d2bd7fe668bd6c4d3f67a3323fa434b4d312cd324090d0. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/COC018315797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf012c535072ebdbcdc96659dbf021135ad56a4d4314a90316df31122f67b4d6b. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:43:26Z), 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/COC018416147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9882b5190fa2abc28ed75ed26c4bf26f6fa69f0eb7e515ed9e63b793e8e6e9dd. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:51:11Z), 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/COC018516478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e31daed319f3cdb0a0190466a0510c908311016830810ed3e8d13118d0f9ade. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/COC018717138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d5705192c625d2a0f86b6197eaaaf13011a9f9899170da8becf537f9842c2c. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:57:11Z), 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/COC018818959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf595d142012c694a5bd52c77daf08860667a9bd17dc909d79d147ed4ebafb2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/COC018717134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5feb31bacbb70c389be436dafa2e87d5beb032a3b6094f0678e4a3aa988f65b4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/COC018114920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc248e0e3653f12feda68e1bb3435c203bd4ba2010825c368f07196e39a0e5346. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/COC018516484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362ed684be1ae368a2ec6c68b0c6506c6bb0c5f005a80b5dd6d69042991f8b20. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/COC018014374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90408ad1518d45dc30a02d4d66d63e13c8cc45aa933493c7201602aa08865c34. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/COC018416142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43499980b250c39faf99ba2e84b2d21244addc3da987853fb23031293e2b0cb4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/COC017913023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b8975483a09df94877a708678ece778ccd72541d03e7fb7ce62166cb56b469. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/COC018817902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c159ae0c3556294bf123c8d2454d5e43499257a0a1a7d149711e60667ff9b67. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/COC017913017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541d93fdf952b6c869bd7d46e20f84486955932ea25f523d52cd591acfbde236. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/COC018115103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cb8a720b8305e0b37556c9b0800eb69750f6dbf82c6bed9cd2714fb72e0157. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/COC018114926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c67e007204e90b61e9dcef8109a03cd5fd42a64101653571b38c9103e1a8ed0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/COC018215347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75ffffd60192e0dab3cff0b7935b57367b7b3d365ca0a45d712afc4a767d441. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:34:34Z), 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/COC018717914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda67c610b3ca3bef7f9ecc8bb634409bf166b87c13e3fdec6bc5dd7c8aa73892. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:24:39Z), 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/QZZ7L2425497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423d7a6db2491b90790816e89022997f27732e6aa3c3c88c1f2bfda1a57e4d0c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZZ7L2425499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc27564fd56fa5e660e8d7469e6d4a82c8a328162577af94dc2375cf5510723. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7L2425503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e928fd4074e962ffc36ed232ba04317c55f4c06fd021aa3734513d27cb366fa. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7L2425505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c467adc55267b8641d62f9c7daf1fd0a7ed9b201cf7c1923f3fa1468463c41. 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/COC011530570.