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 0x0f7739e9043460b2585f85a8c4d2111e5d70c7cc0bef77c9df53ebf5e7ebc3f1. 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/90c3d7f7-f59d-4d26-ae3d-65cc5be26c80.json and https://artists.proofprofile.net/proofs/artist/90c3d7f7-f59d-4d26-ae3d-65cc5be26c80.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 0x376daa2049dbca9e3f26810d0cd8fef64d00709d4b2cb13296ef64fcda96713a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPZ921010775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b399abf7aaf69ac2d94b1d6bd22724e3ede9d1aa116a65586f05df0829f3bb0. 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/JPB601900492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb37bb6aac9c52641096aa7ecb7459598111e0839fcd6680fbc638ced21dcc24. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/JPS809915821.
WE AIN’T STOP feat． MACCHO FOR OZROSAURUS
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dec9af97a85862ff20755e63de2412123bb83ae78d50296ac1ea8e46c7785b4. 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/JPPO00415360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fd38d4b9bf7ae5b2f0d8daf709e0d62e26cee8c2226f2ec0c9bba81e734553. 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/JPMV00206360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dba51118034d02509911d1a7081df4654c6ed287261e289756788087abfba5. 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/JPMV00206460.
Talkin’ At Deep Blue feat. MACCHO foZROSAURUS
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc952deb49207ff2ec399a805499ed8919aa6af278c58763427a935a12c2e064. 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/JPPO00415180.
Feel So HIGH ～ジパングツアー～ feat．MACCHO（OSAURUS）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc4f01e16f36107cc683498f88f3669d6528ce3024290dcf7efc7d95a67efd1. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/JPPO00529790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7c9943064b8b43c0eddcca05b6b4c7824301c10c325a82452aa5d044152c91. 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/JPTO00902752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735783f28cdc82db6cbba8e2dceb83f8941e13adee641323d3eb9895c6dc3c0a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/JPTO01100910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dcdcae6a0e2b9eebb63ccaeeb9f3c2da1b222e6936650e04c9893f16eb0539. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPTO01300660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa5cb4864fbc97362c6dedb60b8012b5028b22eb2ee7f8e3f662f46f7c2c574. 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/JPX601100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d445d6f5072bf015a3525749f512385c2727cc0bedf97f9a40ae558149ec68. 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/JPTO00000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2cc02408411c51ed3f391e2912e854c52eb1d948eb2a1b5edfcd9a70eab3f8. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/JPES01301162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a839e0c968e7ee30c54c591840802d2d1d27009a3c954666c6d6f551ab5d39. 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/JPPO00106820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26243ad608199fa35d3991ce31ca7fcb580957caedce9fbf13db648d589d404. 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/TCJPI1959958.