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 0x5f72abf69b4e89958ebf94b77970208104f52d4a76b3f6c4a68a44cfbdd0308f. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd2a874a-c0b8-4fe0-8255-4254dd169b45.json and https://artists.proofprofile.net/proofs/artist/dd2a874a-c0b8-4fe0-8255-4254dd169b45.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 0xaa917544159f699af06f6bad02081aa8b26ce2c225ee9b8c90fbaf8ae4465d75. 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/JPQ701200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9e0086e5b4755bf2148dc6efbbe7619864cec866a006c61776b94100d55ce8. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/JPQ701200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62eef59b1fca47af5bde680652e9bd83b7cb8b3127a435bc3137cfb51f607d80. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/JPQ701200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f14085c3991b5c2fcaba38b149e91202328c3f4f8d303b2cbf9114b75f4b97. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/JPQ701200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48292d14b5064404ca54f8df66384c7e3ad4e599d8495cf52776c147c50ed7a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPQ701200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8af60f892c39b6f24a1611e57012c645f78b575d977c75dadd83e64983a9aad. 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/JPQ701200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022322a7dcc007c77775cf2a508f1a5ccea123ebabf35ca82eb78e12accf6fa3. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/JPQ701200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fa9f7b21634e569a0623ef3b5d70badaa2e40e25d0f7aacf5e4a3229e3fa31. 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/JPQ701200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2e7066ca087b3a999814c7ebce120a09f1f7053f1dbdcea4eb7bc10a3083b6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:02:14Z), 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/JPQ701200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1985f02288654fdfc52420a99d1df469e90a2da9f7394838e100af18ea868068. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPQ701200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6c5c75301cfb7e02470d86269907a7a6def627cf188646bc89e67b728e2174. 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/JPQ701200119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8d6c7b491d2604775b5465c446241db4ec9ada041253293eb681e91afca9ad. 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/JPQ701200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa674acd1c395047b3f697e854f7c45ac35f74dc599f24846729a70e2f401ed0d. 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/JPQ701200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d64d1360aa6f6a239540ec19fc5cd80cdd1374bb72b7ca86ed4b6015182482f. 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/JPQ701200122.
リラックス＆スロー～アイランド・ブリーズ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e87025cbfe158d8899d00eddc663ed3359cf06ba6a39172f2e73e765b6d7fd. 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/JPQ701200003.