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 0x9e7a0019e65514bfa73f300a8d5b262d70302ea54b054435d65da33d6216b514. 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/efc71e84-7395-4f82-a4dc-5920638fe707.json and https://artists.proofprofile.net/proofs/artist/efc71e84-7395-4f82-a4dc-5920638fe707.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 0xd4219b6d8712e534d71e2ef30dd5b09898f3b5616ec77dfd6ff1387e5b46b03e. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/US39K1415304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56de1c55512a0b88e9f96efc5fcd677c8347dabc9dbcf368a8b9a6ac61d3460f. 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/US39K1415305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6850f2ff9c68040a82ac5ba685a3f46eefe4bda60815740162c5f81f36b5ce9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US39K1415307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fc3a42edb204b61ac9143f1e2bafc7fed605eb569b21580778a6ec8a5b4d14. 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/US39K1415308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885bb2e0a80c2622b9026ba89b02e70695667086b752cb3c443fae69d364ded3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:23:44Z), 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/US39K1214111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70948a5f5e5f549fa1c8a007031d43a180e4d2f89d009915d91498e475425a6f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US39K1314701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225b64469aa4216b1b18584f08bf4b0c5291ed2a65ac7126dbe2e6ae7ae58fac. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/US39K1800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef7e7e9e8fb6f888e5f0ae33af2075dd4db422327263a5e4abbbad52085ec4c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US39K1803501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d4f13cb4f0ce701dd5aa04c4434800b946b58f10e443d91f625fec63ca1543. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCACL1617291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b7991dcdc15709b22032e07c37124e8de3a8ccdb54182b43fe60192b1f33dd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCACL1617299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ce84a4e10d5455458ffd194a5760b9748835c9e062c7ca0db26fa4016725b6. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCACL1617301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1cc7163ecc93cb85b5e011477fc08bbe54b307639d3cb10fd3f42dacc5cb5a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:09:05Z), 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/TCACL1617302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f0af4e7c9ad43ade6f64326f8ca97ce5a248d4cb396c69c1e5fdaad2a41ef3. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:29:06Z), 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/US39K1625202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df1d6d7f6d286ee3b9d81c448552254cd3560572a026e8985b3794a395788e6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/US39K1625204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fcf3f0724ae227340f4436aa97400ed2c9d8fd1f8ab1cd8fd3ececac2053d6. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/US39K1700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba98d4f3e09f95672ef0c4ee50beeb680d39964e933593f15c98f277c415638e. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/US39K1700203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990f8dd697d9691b362c935830a0c9904356e479c84c25e877ba01aea1be3822. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US39K1112502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eae01d5f271cba26d9b48de6a0ea039873a6b31fe102a7956a39840f1f1f81b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:06:56Z), 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/QZMEM2233552.