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 0x7721bbcdb6fb00e7e4a8e41963a0f5cd4fe8763074b9daa73e5e73d7e21c7daa. Chain 2 (Bitcoin): anchored in block 953875 (2026-06-16T02:12:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07ce7b65-1689-4f41-b1c8-9cf49a23b1dc.json and https://artists.proofprofile.net/proofs/artist/07ce7b65-1689-4f41-b1c8-9cf49a23b1dc.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 0x70298310784b8a0f69eafeaf0a698ca87f09433283b79915fa35de38fe2a0d3f. 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/GBUM71008404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae916d633f9b3ad4fd28b3222b731d7f06f62051d4f349bb00fb4fc04fe6a28. 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/GB5KW1702704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baa6be99564f467e493215e0d219359331b6b82f2ccbe37e8a16a7be0d2e493. 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/GBAJE0503863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d118decdfee90497e893750a934b2f7a2cc20139c212337f2979f0161ddeb6. 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/GB5KW1800338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ea16477886d746733da4768a895136d76f7ea61c1ae68b4e054dc7f72978b3. 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/GBAJE0503867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52f4bf3b975a9fe0864c51e675b877a594278bc98f68b9207f0585184af327a. 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/GBAJE0607392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf5da181839f4527a1000ec87b8d2bada1c101be1831c6150af2a774d13fed4. 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/GB5KW1800342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6cacf3bbbd64752d19bfc07251dfadaa91d14b653b5c79a692f3aa121bc17d. Chain 2 (Bitcoin): anchored in block 957034 (2026-07-07T11:52:37Z), 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/GB5KW1801039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609841dc190e4965b2d8d1adb41b327e1f11f7ca817016afa7bf0a3dc9f90e29. 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/GBUM71008399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb7684e400607bf0c5042dcfee32cacae58843f9514a9b76757ad8d1ea45fb7. 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/GBAJE0606273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd794494e5a1a50d579441b90c83006fca5fb6276318ad0d08b21a721240ce18a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB5KW1800358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3697c8ad919e817cd29ee3e941536a4e8b7f30ce9dc98f6f6f849a39e7f475b9. 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/GBAJE7300498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca7c879ee1b2a5d7f07ce3e1fc8ee7edac823835ca9e50375fd1143b521d032. 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/GB5KW1702694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405d77834d2d0efdfc4f5cfd001fc35d4cfed65090049fac373d46352072160b. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/GBAJE0503878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cb1f815859a0d5ffdf1fd39b12bb72a7a8a359dd4ac3d158830d17344f8a59. 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/GBAJE0503821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25336df74b777d7365f8cece438907c525419e91ca84a7f1ea7eb4c81ff5321c. 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/GB5KW1800360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d2100abbd94a2bf9735fe51d131f199486793ade12fa1857d3f53b9745eed6. 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/GB5KW1800364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7e75095aaecc917a538de460223635fb9305630a684503d914fe3dd6302213. 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/GBAJE0605983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fddfa89b3f440f2f78167800bd053adac09a6af6c5241a93ba235b7b009ad1b. 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/GBUM71205467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797fc521630c46c8017c8b2bddb9a20d1d904742626bd0c5375068513b107a70. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBUM70811374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfbab92996866b48b3565fdd252fa749814c00f1b817c94b82f16e1ed28710e. 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/GB5KW1800365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512ca77acc88227710bbd4375c72e38bb279c58885c5884d6630da1d8ef1e1c5. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/GB5KW1800340.
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 0xeb1c9c7a889484950fad7f13b4174739b579b87f276538d6d754510cc8f57a52. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/GBAJE0607353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9890f538f531b881527bf0de60db698e57534757b3e5e52e2ea2a3413cb0292. 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/USJ3V2115370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f3274f15abdf7c36905ec174ff944c9bc1d865a8e443d59175154b41ec4683. 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/USJ3V2115371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c894085dfb20969a73756c7f7257a1af5572691124ac766806f2311fe0916ad. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USJ3V2115363.
Reggae Super Oldies, Vol. 1: Block Party
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00b16642bd8c16015ded4a82573620f1f11acbfc2c5fe0676027e5a4b55f7ac. 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/QM4TX1954381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db33579cd48700c0fa9c3d919f2eeb0fc71d065562e29e2eaf0df1d1bb998da. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM4TX1954388.