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 0x3577c92bb42ad30173310d70cd06eb3611268075f7a3e2d496744189378493de. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c30109df-234a-4779-860f-eb4f7a3234e1.json and https://artists.proofprofile.net/proofs/artist/c30109df-234a-4779-860f-eb4f7a3234e1.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 0x9d795c5e11b92f48906c23582c3746b856fb84861ad6d5d2960e47819863b760. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMBZ92270984.
Medley Jorge Guerreiro: Bárá Bárá Bêrê Bêrê / Dança Comigo / Vou-Te Tirar o Batom
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdacbb6763b95ccd9ceaf484c5b743d7d56384935022d1102ab2c27d9f793b35. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/PT2EO1900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533d88690c94a5cd1d2f625f852aad06f403bd18a6d038ead7563ad4ab4da4b2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/PT2EO2200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703130a43c7b5c763feac2daa93c07d47f5200c8b7e0bfbe7172a94596a612c8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PT2EO2200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cd66e2f1d5babcdae3fdb61d4e560c31b8232a3b6f8b909bf15d1c802a827e. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/PT2EO2100581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91d02603c92a3a021bd3641e7d3fe47788d4618c45fdfe0922489657470caaa. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PT2EO2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c63455649b2b0fa46dac2bbe279e565ca45ad0b35e870aae27d61549aeb58b6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PT2EO2200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cce8c127a179f38828487eac17010e45edab4c5c86bfa82a0977e5e8afa435. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/PT2EO2200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3db46e820123da0a9358c788c8b1a783178371a249a7a612f81cc0799158c04. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/PT2EO2300405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1da8cf412b9b0e1404f2db6ea87968c1734cfc447e72ec216e9c4275af9de5e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PT2EO2300409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b61f3ac5d6c81ffbf2fa52e0cb1b037c90a637cf56898462684a211d238051. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PT2EO2300403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70729318e716087541adfa25ae688c961475e49fc5cea93652aa1b15b5365ed1. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/PT2EO2300384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3266a2b37db9a26142502392a1b5eb3e76fdf56c33ebe9ef509fc9d1ce5de51. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:17:16Z), 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/PT2EO2400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef91f0a2983944a9f19be47b826d7cb0d2e1e600ae964d3061e700969812f13. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/PT2EO2400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3266a2b37db9a26142502392a1b5eb3e76fdf56c33ebe9ef509fc9d1ce5de51. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:56:09Z), 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/PT2EO2400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6b19b2156f70ae817874b168a39ffe2657e055a996a1d885c20cf81376d234. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/PT2EO2400426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6b19b2156f70ae817874b168a39ffe2657e055a996a1d885c20cf81376d234. 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/PT2EO2400426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bbc74e61a2ea8a7747d1d7f43a4388d8012fadd9bc00ae5985faf7df9c19da. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:48:59Z), 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/PT2EO2500243.