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 0x698401820604d434a5d234bae85c9337ed9536945683bee47ed10376db3470b6. Chain 2 (Bitcoin): anchored in block 954035 (2026-06-17T02:39:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c5605a1-1f38-4f4b-9fc1-8e02b006f1ce.json and https://artists.proofprofile.net/proofs/artist/3c5605a1-1f38-4f4b-9fc1-8e02b006f1ce.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 0xe5f6f031e00cc3876f13a647cfa79a28013e80ab3adf7e996c4024d6b03cfcb7. 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/BCARL2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2558b75675b3393223aa70c5e5dcfdbadf38790b5b0a8752a1d3777469e46d7. 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/BCARL2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72900728647f6b28659778ff7b0ac9bff139d5c27aac0d8e3db2e7181665ed6d. 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/BCARL2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81df387e53c87e1541fed117f5a20a0e120393fb52115e72d2fd45e2b59c477b. 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/BCARL2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade8dfaf77385fe8d51dab09ee93589ad410351dd41d37f89231b08d198f7b95. 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/BCARL2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d1a863c4ff0d0b9dc596919df5d67ae418cbc09ce013ccd5526814b82b0e0f. 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/BCARL2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c978ce5b0f31eb9e599b63254be23851a948247902d9d566f4036525976860a. 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/BCARL2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f72f7712ff6823f07efee96b3009fc41951ab09eb86cb24c923f2b12c72de0a. 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/BCARL2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e7bef1af92ac27fc3c8c06ee301549be65ae08b21343ea2eb7e7a31ab34142. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BCARL2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea85c90b68bf36158e249cb4fd21ded779b2205f674472caaa3cf35a8ce2ce48. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BCARL2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647418df99142e885219f4d3a0ae5a453625a092fe644c07091ff68448308049. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BCARL2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f87e9fb8120616882038ed7acf143659aa081796468271cf4c50b5f148f6580. 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/BCPOD2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2169359a4878987397edd33205c3537f9e5c9500be24f02c933396492974285b. 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/BCPOD2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18d5af9f7c6ac0047a3e38f6246b883eea18407925ba274693566479e4390d1. 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/BCPOD2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1dce894c83cb9a42902c40567208b15e885baefbe6e06aaba3ee67ec79a8d2. 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/BCPOD2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd613e8c030d4d43e15dd10cc3b811cffdb0a95bec0102b038ebd3c8e6f24055. 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/BCPOD2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e97a8dbece36e6805a372bcd4eca7e7f6624a6862f42697d65f4f1662317a7. 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/BCPOD2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7bd5c8c0c2a29b861bc51778cc385cac864b0127b8eae06e9ef7d14a8997dd. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/UKXN22344318.