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 0x5380a371cc8fb17b173ad4a65c72a8e555e4b4bacbdfde1c67d80c1183e8c99c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4f5f832-6ee8-461b-80c1-5517f47e6353.json and https://artists.proofprofile.net/proofs/artist/a4f5f832-6ee8-461b-80c1-5517f47e6353.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 0xe4357f4e85dac8e28c7f307b69e42ae8ca993f87f3d536c3114e4e36ba635bbe. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCADE1787074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca6010796d9e5074b40323d04f0718afe860b552c62f3b6a3935a37d011831d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:02:33Z), 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/TCADW1891357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b8eefcfa6d855129b34f483235b673c1735acb120e48a74e0e49b71246ea27. 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/TCAES2021207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eed67b3b5774c4f8e5f8dcb040729288e15c7f011d8cc9569873cca635bbea9. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/AUBEC2032327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657d42ccb27ce3dc3ad31260c5818ecf5ee7ee89017a06f4390d861d78d0c6c8. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/AUMEV2146149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecbc4ad08c3a0ea54d5db8add41d34bd04260514299f207aff5e7db9f75b938. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/AUMGB2400942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173e3dbf4fb18ce18b2599ebf93aeeafe9988b7eafa92636a838d781e742e8dd. 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/DGA092369204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e28bd31c480ec5db45f2dacab72dfb377277b5751a0ee6c695d2f37080f9f9d. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/AUMGB2401140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8eb915164802a54d311295b706380a5936e12ae303a0ab98f9ec4c93085a0ca. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DGA072307670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b5767500c2bc3d0cc7d1a148edee40f2a10eabbd5256fb83bb652b582bc840. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:27:34Z), 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/AUMGB2400504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a839034e2953927c0f7ca33eec2e29dc9606b4f67faab2cd51210534960e2b9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AUMGB2401141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553a710adc4cb79f84f1925deb0131c869c082bb8bfbbc2c4bbbb3ee43ad666c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/AUMGB2400658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1411ef4c1384d223f438c1242493f031e000b4283001da9d2b264c5b90c1ed8. 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/AUMGB2401144.