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 0x0bc0687ccb276ebec7e6d0a6106c01e2fd42831fa89085af3210178dee20e33e. 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/8b94d0af-bc82-443b-aa81-2e4786a27fdd.json and https://artists.proofprofile.net/proofs/artist/8b94d0af-bc82-443b-aa81-2e4786a27fdd.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 0xa7aa121720e597809af8c63f7558b84374408713c436b1de84d3f16941d4ee1a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/INT762200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5003edc706ea0761137a0e83c830345e80ec1fef584d263dbbbd14316a86c9c3. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/INT762200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9dad1b3846f78daceb497ced7199ec3a466b2b3f828a222d88bf382d4b8dae. 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/INT762200308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddca837bdb1b9f44d05bbd96d07473183a3b95c4efb73d523976391e1da8824f. 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/FR96X2249390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e22371914bb1baa731f490d5409f31b25b1317676b1a5e1e127f9c6f67e61ca. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX282218333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedf6b1e4bc2216ce4e7d03ef807ffd8f900b66adce6dd51cec11ba2623c0a2f. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/FRX282241376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97c049daace67ee8441633503f7ebaad728cdb5f46e9126445c25d291aa097d. 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/INT762300000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21810855ec9350380b6d93bc07302d06ada7f79806ef3be97acd0b58f58eea3. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/INT762300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d082196bf5c383c44c942912bfeb554d860b615b5d69c5c8535d389e037f58. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:31:14Z), 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/INT762300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cffc883850c326b81d70263cbaa7ff02c1b82c870f017f02276522ba1bbd8f. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/INT762300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb645a5d25d026a1af8944017df13be19bdde72057fea9e9d9478b03ba7aea003. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/INT762300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea862e73373f80b95baa5e32eeb5387934f06c17b417a215a2e257c8f224b69. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T13:00:35Z), 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/INT762300232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9521a1c2e7703b829c03c445124604130d84730ed49131aa109870ab659f8c1c. 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/INT762300267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7215f552837cfaa4463576106346186698497336d61c2cabe0e1555d1d5abd4d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/INT762300288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98309f016435cc428cb3e33a02439eb7ce4bb5ba9cc3c614283b880125dac219. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/INT762300298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c004e689c93ed901859ccd6f870f1ad98f0d32fa5860cb626ebb5dfc28d61e. 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/INT762400239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d47d59ba933779a80eb72ec2fb9d8641482cd8b4e9420dd789ef0e2fe115647. 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/INT762500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97faf1304fdd27e675cd98186964665b8fbbc78f7e1a6688cd3afcae3fd6a6e5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/INT762500125.