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 0x42ac8cde62997eaf6083c56bf4ca097fd8d9acb69ff20841a6db23b62fadeb32. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c7d2d34-601c-4f61-9ace-03216ea74e48.json and https://artists.proofprofile.net/proofs/artist/3c7d2d34-601c-4f61-9ace-03216ea74e48.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 0x0161e690e8761444015c3287d29348da9cea0319d2133dd3abc4167427420d48. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:13Z), 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/QZ2J21512974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c09edbb80c792e46a3ebcd86ba84e961c859be6492726d7ac2d37b253e9bdc. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZ2J21512975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2263a3ed6d82b9027120f7cbd67606f9c12999fad9e139070b2f13731cbde7. Chain 2 (Bitcoin): anchored in block 958399 (2026-07-17T10:39:51Z), 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/QZ2J21512976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc12b12f59d82b9432607f468d34ce1b4e77abff72bd31c76400e63481294ba9. 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/QZ2J21512977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472b7f89426cc1478d4216f6c9dff9a36f7cc795593d24780205731e86e30a4f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:12:10Z), 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/QZ2J21512995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d23776997041af0e3beffb702a75edcce33edcea20f8261aef9bdef63659e6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZ2J21512997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54278761334ac68f9bf27229783816a961166b261aedd3dc09a4d4b41f5bc94c. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:41:27Z), 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/QZ2J21512999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d01bcb05428319991b3ab863a8a131b56d7c5571862e0ddc62c9e4e14690d5e. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:45:27Z), 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/QZ2J21512984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea780f6b636aba80ea94b8bd96ad996dfeef94109af4ee5367043766d55ce415. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:18:17Z), 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/QZ2J21512887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208ca094f193f82d92cb7b473cf16fc4987b8304e70a20806ec43ef51193cff1. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:42:59Z), 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/QZ2J21512889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd06ce63b8eaca4906f1b80fa40b04af9d1cf3bbf44a3491cf03444a8f56ee65. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZ2J21512892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b26d823c9ca981ecfbeb0cda795937f8c1a85972f75c360b05b19376d7bf8e8. 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/QZ2J21512894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74db2fec9c11bc67f406cfa3a5d8f38bcf1b97891e0ceaa5394bd754486b112e. 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/QZ2J21512895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6654e5fd30b6b024e214d9c8ec270116455121755508a0400a869c7eeee46fce. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZ2J21501423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4de32b03b12c5e63de5abb86cbf5683e58d6deff76bc72892ee18e0ec6f911f. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZ2J21501431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc92630bf78ca13f8f4a55e198fe1ca86839720db5d28b4e37f4cd4d304e695e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZ2J21501401.