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 0xa06d1baa4978118786bf0fd256d2e14c5245899efb3d638ce96216e0461ad6da. 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/0af45702-5ea1-4546-bae4-acd3be522a73.json and https://artists.proofprofile.net/proofs/artist/0af45702-5ea1-4546-bae4-acd3be522a73.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 0xabdb343702d60e16bded3e15ad66008df71d49f747600208b8f583de66617ba8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLRD52119936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fcf82033390418f93e652b2695612733d9dc27a4f05ede5d92e4c577a30728. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/NLRD52119894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6e13d8a5a73f1a0808e1c88fd507c6ec86a76e3d1676b830fe3154925fc081. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZPYN2206275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf560193475b518d71ad7005bfd01c665d1d1f22225373d53505709ba22541e61. 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/DEWO71700269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e2132dc4d452723951db614e10a5fd7b097300f34317aa61ca63f63f47d1ed. 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/DEWO71700258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90a164c146887d8ef81e7be363e1b9db4d9777d39af3bfe56bc9fdcbee4bf64. 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/GB2LD2110221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86bfed58f10a9881e615f0297ec03a5785e807617154d17b72e9ba9b29cd8e5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAHQJ2016754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ee83141a8dce8ff01c79f06acec04742ff6d446f5d1306e2f10373c9768d46. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAGOO2068468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251a5f76b3e58f1f8e5621107689fd5a12176b9ec46fcf3b43880325568c174e. 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/TCAFA2065651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1d4bd43e7c689733cc3c1c2c70c6eecffefc6a0903c32a0acf7acc29b7c4b2. 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/CAENV2038021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf681e353fb8b4fd30f1c9ab3c430d61ffd02f00a42998235408a5ba502c73d4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEUM72004014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531b649b7ea54749d59e77016c0e21de032212dd76717f54a671cecbb7a0c378. 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/TCAEG1985155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cac936aa796f6b9b4ec671a18f28868d0e1de4270d7e7a351cdbadeee34909. 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/GB2LD1900129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec1cd6c20f74135b1c07d7a939751ab48c19ac8ba30577056fa2f4259bc7a87. 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/QM24S1911783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc66a646ad17263ca948264d8c01e3715671d05ce46ee3b649df1334ca84fe9. 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/TCAEB1989426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d58226470dec84e56545472217f889b9dccbecb06e5aa0f5dab8cc4b1bd71e. 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/QM42K1769920.