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 0x8b13a41a83348bb4b75757451df6e292365cb86fd2569844aa389250ba66e706. 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/cef8066a-cc5a-4e3f-9355-76bc6617a842.json and https://artists.proofprofile.net/proofs/artist/cef8066a-cc5a-4e3f-9355-76bc6617a842.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 0xbc9360cb95c5d8ca9741414c76e7b173f5b56c76ed1800a80e89b41f9725a9a1. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZS642345048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab679c5fe256029e95d2ac66e5be55a6cd1e0fa0a40d59d9f35c0f2f1e03a79. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T12:00:48Z), 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/DEPI82404744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10e7a97a3a825656dcd73e54f87c11ed061c9d4918ebf9fceaee9c30c7745d2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM42K2298619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955feaab4916efb1a024e385baebfb7f33ac42047b2a2a5dc9050fb81e5cdea3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEPI82404738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a6a98442f8a6fa42badf25cad747914f52b6b2c1689ed33d460481b3185a32. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:02:24Z), 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/DEPI82404237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff6e10b10141652d92a476246c0d208556411deade39ca284ba0935e31d0780. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEPI82406282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c5b4898ce37b7ea7f6d6120e36c0d00b2e6d59d801bcfa4a7dd97ea727eeb4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEPI82431265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce732aadb0d98acebdde240359e553181ef1d4438019d1ec7742e22f7189b09. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEPI82433342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cbd690823429ce32928ba0dfc1ba42dde90d9d44a75c085ff81a89af2b7bc5. Chain 2 (Bitcoin): anchored in block 957541 (2026-07-11T08:23:18Z), 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/DEPI82433514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34af3a0de122075787ea8a70cc16fe98740980a6cff1c282bce4e412db8d081c. 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/DEPI82444368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a64dd43aaf2cce8843143867a408be4d5390944b99d281c91ad9813515caf1. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/DEPI82451942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa882fd1d11c6e9806f34f17938a1bef6cc49b215b3ce8c8391aae3f20d2f36. 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/DEPI82500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca96bdf01234ebe4583f7318a546130695bc7e1c9f0cef180eeaa5fe7f5e04b. 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/DEPI82507976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaece005e8fd79f8ea63d54be093177594419eb70ca456655888540e20b22807d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEPI82519968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda62f93571401fcdf1fd7b7ab55db834cef0ee86adc7c9948ab5ebed4e08ea9. 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/DEPI82537380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b47eda6a47d4129bf5a3785fcd01fd6c6436ce45c145c9db3b64d4fab6a9060. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEPI82549158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7635b293644342819250a8070a2d2508ad45355740367a65557f0f14f3ad762d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEPI82559462.