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 0x13c62e1943e140a72023c1bb4c7146fae510391317bfddd494cf4216769cacbb. 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/10b6a7b1-8eb0-4237-90d3-745c3e17a7ac.json and https://artists.proofprofile.net/proofs/artist/10b6a7b1-8eb0-4237-90d3-745c3e17a7ac.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 0x0f60cf08b43eebb763999fe066aaf97ec51844d9c3620d2cd97d6b36f877326f. 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/QZGLS2346262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fae76165495d122d99f25c7385d727dec3062f97dfc985232772e4f608d661. 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/CLKT21901748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461ca715120e2169f10c59733940218d6c835c79fadab4f73d21a9c599b0b983. 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/QZW9L2226845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1a7e88a1fa1dfb06f2665b5aca0f4186fb2ed66b33b42ab6bfb1642b3fc84a. 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/US7VG2414329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633c491239ccc659ae5bfe0143ce88494f54f5e763d579f1ccf68e4aaa19c3fa. 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/US7VG2414332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bd2158e18e78383ed5ca7a57d0de4200dc73742f8b27d9c175049f2aa7351b. 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/US7VG2414336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e1ee64ad264c92648f38b1f025a21642b5c5d84621e509dc1cbb6dd25f2990. 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/US7VG2414338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4702e0bd31226208881d044fe7bcd8126d901bde2998fb8748c2f5d32b75a596. 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/QZNJW2431504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a578825c0696f95fb90ab6a389d15c56ff513decef5f5bebbbf80c51f11e95f. 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/QZGLS2442050.
Rolando Fino: Sesiones Chac, Cap 07 (Acústico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabcb639c94563dae60153e5889afbca1ebdbeb8be140242c01e194f465e32f5. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNJY2387165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c2618915ca4de24f6750d725a0daee0d6201e310dd9bf84f62d4ed650845e1. 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/QZNJW2331082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf710aa3f11937cd2c50ab9d884cb79ea0990cd09c6f214559dec3f3e37e6d731. 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/US7VG2313042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c9e24dfe3e2b0ed2c0e05f5dd13673177e7218eef2847c2acba4721c428e1c. 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/US7VG2313043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1892b6db2a99f2d52f5996ab9503396b5b450be0328eb8b89b77861a7107e7b7. 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/US7VG2313044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c6084a42355ffe362d2b327b77e0197f84dc01665ac71fb429bab3debbadaa. 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/US7VG2313046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d273358cc21e73bdb8e148a8e5b8d4020cea8f30628f162fad30f4f4780a21. 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/QZHZ32241172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d98fde11cef55795fc62058edf0cdc42c8ff31cf3c8392c50fb23f8c81683d. 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/SE5752135837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9990b8da21f38d2417ec48e9e9d6921351e2ac6ac49e1da2a713028a09a14d9b. 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/ES71G2031814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a2df66c648993f4a29393f34eb34edead88a22d534e41c390b5a08786a7321. 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/CLKT21901902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de9607d4989d5a921671eeb05d4780aa60273ba09be02d4b3617c67b400b957. 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/TCADP1879470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fd12a5d91431887b590e8e1aa203a69de962f77ae4a665451521b7834d779c. 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/TCADP1879471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1132723b9cf75521335a2ebddc6ebc3be9820cd0fc8dee2d6dddd281174df5f. 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/TCADA1761943.