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 0x0d475eee4cd0001da8916a884bfc4f570f3ebe1780235a1ed02a8a17704d3805. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e9873de-aee7-4777-8f3f-88e6dd191241.json and https://artists.proofprofile.net/proofs/artist/1e9873de-aee7-4777-8f3f-88e6dd191241.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 0xd2525e18e0743bf1813b2a7077775b5708033ddb0cd3605d8b3067ed2f903db8. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ING501802550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cb9fa4a76f48f650aa9bc1236ead2d3c2291292cede6fd7641089dc782e23f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:14:40Z), 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/INS182115767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b23b936171f97d73707da9deeb5d024f672165fa8769217cd349e4b516f990. 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/INS182200377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe408092c4d2a3f11e497e82ccea83df1bd2d158e912413ac68db1fdb62ac96ce. 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/AUBEC2230118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd2e1aded04da4ea2a8662e71ce90d03ce478dd2348e43198493263f27bf2f3. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/INP532100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a25203186ff3471aa54b29917550b50afd36885091d805ae1bda4d058d0558. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZTB92277905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4966ad608fdbc3d5fa4c5c780d3c0f5a414d75de3f0e7d6fb267cb9dbc497c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/INJ442100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62076811ec91be0fa88c83272fffdfb4a169f60bb07a06a6f0411d953aca294d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:03:47Z), 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/INJ442100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714e7bbdccb77c7fbe8806f7c362f398594cdbc2c4392a3a29d5670e148486c6. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/INJ442100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db77409053ffdb57e2b2fa41a34acec534f5531b5e28d61a7d18c4408ebed6f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZHN62391503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02e31d372ec97efd9b51b3df0fc465b25e61b65388ea00c233567a4a9eb1ef0. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/FR59R2458273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440e3f9f5bf92cdd5f1eba9f6197d0646c0e26bb5b838d727085bb7a95e7b40c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FR59R2458274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8be1bafc280b7b91fd284529f3e507226b54e35004550b28acc3af39dd0c53. 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/FR59R2458275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532a7188e703ad51904049154acbb7ca9eab9368d3c0319c45a23c72a3f14d78. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:06:48Z), 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/FR59R2458276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db19aeda28eb9b787bd3913b2270f99503d1709b0992e930b21caac2c689877. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR59R2458277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9f5ea71cfa9dc9aa03fb1cd52712f6ac16d85ee17f2c4ee99bb2bb4ddf1da2. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:52:41Z), 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/INW132418126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fef6865ef3c26edcf8850e9af1636bcaaf1f4f7c1b1aeb70116c35ff1b59cf9. 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/QT6E92537716.