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 0x7ae85081ca6a0b0e860a69a8a2a0e4c448b3f8e0a9b34735c43838b25c9f08e5. 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/1a4f041e-5a16-4e03-945c-ad47d3c6ae8c.json and https://artists.proofprofile.net/proofs/artist/1a4f041e-5a16-4e03-945c-ad47d3c6ae8c.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 0x051cdd2dbc60059bca0943a1dc8bf496bb8e1043075ee047fa0fc9f1d896860e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA62336813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6716131911b160a67da5d912411ef56f5421f170cb3a358e4b9a56e3007d7f8. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GX5MY2157051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5805ad89cca8bf4be1452fde3ccbdf4538fd33a4dfc12339933f62217cb3f169. 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/GX5MX2172143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda64bcd2410055fbf724b64aeaed2a7357a1242959e86bae08ab905661220db0. 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/CH6542200949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18095893b91edef7c1d4ff83944499e235f4052d3c4b2d9f180955ef54fca64. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CH6542209071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef128ba5549c5cf56dec59d8341b58d0d71e3cd7b5f71418f2c370071345fba. 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/CH6542238584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67abe42a2b69b394dec07b39f264004af48ec436441d249b6c280c71543c469c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CH6542242582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8cfb3b8c63b6fad1e2c1cb258d86f5c84184e701a552be89fa0a7c21767915. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CH6542275015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb52e638a15caa90a44efd53ffcacb0d8155a123d18d36fb540f0b384dd4549d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CH6542284435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1442ce6ef41563d589e6f6843920098acfe1dff61fa69ffd1bbcc49017d628b4. 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/CH6542327356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c8d36185c6ec90b0b880dfe0ace49f6b7ebb2cd8f40a97b1e367dcdfcfa897. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/CH6542340804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c45b603d5951e8f87bac9da31d9574d4c7054a618c82230bb259baa575b1c3. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:58:59Z), 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/CH6542359916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d86175761e536fab597c0bba7f47aa1747080950d9ae28ea5cc775de4d5676. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CH6542389064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afbf599ac0ec436bd9a4a3fd616b3b5700eddc5faabb2555b72346307636d80. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:16:43Z), 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/CH6542412906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd951cb62d37d9365ae4049bc687ae0ac7220fdb3938ce718208b86df4ca1fa14. 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/CH6542440392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8e5611c3687018f85ee3ba6a04108f2267c8a22c80b01321d37e6c4f70f697. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CH6542447826.