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 0x157ef3c321151ca67baa89d9c3443b69dfc6b538340fafd47049065b63914da1. 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/ff5079f7-d108-4028-9b11-f68a86b6f700.json and https://artists.proofprofile.net/proofs/artist/ff5079f7-d108-4028-9b11-f68a86b6f700.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 0xfed4fa4c72ce456cf02a140771de5dc48c4d76ffa067b3da48126b69b34cb437. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QM2PV1636318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fce895ddacf13745109c33f16d2b0f3f25e5dbf7760bca26189e4b8f03f1ae. 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/QZ4JJ1770402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b93337564c148964ae042f81fe5c739ab045c6fd726fff0e97917a33c1025d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:04Z), 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/USA2P2016575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2479e88beac64a4ab33fe9e984988a5afcb1c57627ba4487861632e07394c91c. 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/NLRD51632988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b29d53ac9a202b51a7537fe2314649363da1f16f34a22234215f94f75a8274. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:42:18Z), 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/NLRD51632996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c863e8a5e99b284a0a034309ac94384f3a2903d5bf63db3228cb3c4428ba5ce. 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/NLRD51632398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56df93764f3a444daa9ed125a3d495cb43cd28a75bfa900658392c4d7b8312a4. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/CA6D21900239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6182111b2a8b59ebc3689b80a4096fb0ba1cfbad3f6e96fee8f1342e3280de4. 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/QM24S2107095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0030bae59bb6ff4985d808bb9d2b928b06d1830454928ad33cb14936decf608d. 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/NLRD52023142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0030bae59bb6ff4985d808bb9d2b928b06d1830454928ad33cb14936decf608d. 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/NLRD52023142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628b216de474f52b7e8fe58c24336285b9d46519538f81c69a46744319094e48. 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/CA6D22000313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56df93764f3a444daa9ed125a3d495cb43cd28a75bfa900658392c4d7b8312a4. 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/CA6D21900239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206258e0ba662fa64a79e628789793662d91f3e6499a5ecf7e6f0bbd2e797372. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA6D21900361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7434c35020914b048815c29e93dfb4a72c38f601c26d1779433c6fb7a20a518d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P2401455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2a747c1339707458965785619054eae81eb2d3548c901028e8dfc283adc699. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/NLRD51632434.
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 0x70c12d86f14d7f66faf5fc8aa89dc2da5720953c862eeb490d9bcc4f4ea585e1. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/CAR071600378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891357cc5b3797878dfc62d02e7a989856d7a4fd437bf8ced75c6b0a2ec680a2. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/CA6D21800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71822ac935bfabff320678432bbc7ca04417f5a5fbffeb127c162f35e592f811. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLRD51632787.