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 0x20b6cc95a1f66d8520337ed9c37762b7a5d231fb6b3d2dadb1487f8824f9df7e. 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/d588dd8f-275d-4581-993a-8acc4c9e8893.json and https://artists.proofprofile.net/proofs/artist/d588dd8f-275d-4581-993a-8acc4c9e8893.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 0x5f9e9aaaade0f594b4cffb0b44d6a36046b4ecfb92890fa6b3c71449f86cd16c. 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/HUA320800128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc6814175782583458d7ef9dd929b3edb3df118e58df63daf20d9dfe197a879. 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/HUA320900412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bd7d68087a7e564d386b513ce68761e9c23ac21bde977c54258d24f29aa8f0. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FRX202065951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79df6c4c095880405f53c0294798759e72f0a50c3ab5d1b74b97cde0c5c102c. 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/FRX202065952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd14fb1c8d1e48747b7f5c9e8d3e7011e48a54b63f4e06997abfbfb156fb593. 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/FRX202065953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd76a408b9099a0db134494ffe72a66642309a7cb0b6f7c9f4e65fce5a330d6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FRX202065954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeea9cde7b9fc56dab0784f650db058c5d78915d37e9dbc24116b7f1831d128a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FRX202065958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1063739b3172dcea0b47c1ba3344032af6de6c4e953ed8e00a0827ff85e8f27b. 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/FRX202065959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860964e19ba494ff3e299f578ee864fa99f92b20e7f0d767357565eb933b929e. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T17:01:01Z), 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/FRX202065961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c37513b55578a82368c43b0c3b8036ed84d8612f4be42b337b5a74fb8c2bc2. 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/FRX202065964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9838536816f94bc40a23454201d2a9f604981198bd7d17e4941628006bec67. Chain 2 (Bitcoin): anchored in block 957648 (2026-07-12T03:52:24Z), 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/HUBG12000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433196b942f723529762a956bf04118403d3873de00746c6028fc7f5cad6fa97. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:48:41Z), 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/HUBG12000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9237c062456532f0983b2f7dda791c6f41fb2a748c0710692234eae1a39862a2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/HUBG11500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55cd583069d251cac98568e2bf79701c0e91546190ff46b5f3797ee63fc8790. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/HUBG12000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d5c7edf2839545a96d8ddcd14b865adbfd805219b62f8f90563cb2397db8a9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:32Z), 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/HUBG12000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed798466fe4fa230158445a7101f8696755f0eb14ba5029af350f46aeca9e97. 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/HUBG11900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698e39c516c95c5c336d56ecad05621a49943a1ba2456edfc29d37b98096859f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HUA792400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35512f1bad414bc9dc29daaa1ea45d980a280932027f399807af6b8a21f5feab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA320700532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2b3dac54dc43816442c93a3546607f6da328179b1b069e4110ddaac4492ffd. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/HUA320800447.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch