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 0x9d14f48eb8ea5e6d9ca9fbae3489cd97cfa37801ca47766192c9aa4ffa079a8e. 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/a2b89127-f2b0-4029-8f5e-0679a6feaffe.json and https://artists.proofprofile.net/proofs/artist/a2b89127-f2b0-4029-8f5e-0679a6feaffe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Clockwork Orange Title Music (From "A Clockwork Orange")
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 0xb3a7b406bc9c6a789a4f7c89a143253e876e348017ed05c766545735da16a47f. 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/AUMEV2135989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d82f0639768d097069d227772ec4a7b3934d7b2ba4fecdbf857bb023047697. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/AUMEV2276290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb573dec7b80a0acf1fa9d83a2242c8ca9223d99ba5d30588895b8c8ce78d7c. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/AUMEV2138358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d82f0639768d097069d227772ec4a7b3934d7b2ba4fecdbf857bb023047697. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/AUMEV2276290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978c95672c866221a009478dd36b3c169469d93531b5fd2c3d55bec2c405b61b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/AUGBT2325497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ffd76ea6a463f49a97407751be13444c670eb471c03d86f41296cffbf94720. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/AUGBT2331866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de310123c8ef43505c000c02aacf9231c4b3bc3d4d39b61294a4549659f31bf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUGBT2324582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ca80ae3206f6cf5055b85db3a189474fb36e28788722456107bfa93392e544. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/AUMEV2414052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a35c558af2e74fad886b092df9228ed62abfbdebb9c6cd15f260908afb8a561. 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/AUMEV2437189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15f88e5afa96beb49ab9e55be2618fa493019359c3f8e520f90135c56c6a0bc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AUMEV2421282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac71aa7adae905d5e06c73281f91ea223147a4c903d2d0d8869c256c9fc8f82b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AUGBT2411551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fdc8dbac981585477b5ebb193b4108aecf5757b9c68b5b4752ec3aa1c3dc56. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUGBT2446536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5e789e1925947532321c91e930a1e11fb0da335f96fa601ad57cfea7720cc3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/AUGBT2479758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50e1d8f466fe9e5a50f724d469158221424134ab641350e9df6fae24169c1a3. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/AUGBT2488584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4311d33e5f5d17d7bae680e34f07f9e66420129dff0ab6901257bdcbfbd9e6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/AUMEV2508720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca92af44bf2d6cdc8a445f037001035d7c2c20bf6da5657f60e8071ce8fb9fa. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/AUGBT2524702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341ecfc2d1ce1e3066c02ca6ba343ff924105fc531ec3d42d60f45dc6b66e51e. 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/AUMEV2143909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3014217a90441200fc9b7260d78e0cd8bf7a1b271fc8d955d2613671b1d6963c. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/AUMEV2452999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130613d927603c1dd0df28409893983490aeadd8054a6dfab750d97217ce2e73. 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/AU3SE2200819.