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 0x19231db2ca764b9babbdc3b12dc6466eec2105ec4fd08567121215ac297a020e. 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/71ee886a-5e43-4930-b854-f2e68c591b83.json and https://artists.proofprofile.net/proofs/artist/71ee886a-5e43-4930-b854-f2e68c591b83.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 0xbcdbe8d68133bb0fec982cf867856bd15fce06a607fc9f5ecb9b8375218fa153. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6I32186778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4b872455e1151d25a4c66901fdd8739860e672ded09c292f92dbd57838bec6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ62117289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63fdf294544c36659bde66b76db2309957a1aa3eeff5b29a83b07f55ee000aa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6I32186781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1a04258be4f8c664778b688ececaf2f3602e3f450f94faac867b4cfacef80b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6I32186783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1bc0ac6eb7092ebf474ad5c3d6a3a9af410d8abe5f1af573476635cc59541b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6I32186786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdda097ca668175e331734b3ca017c31fc3a58d7302ed25ead98d6582d7df97f. 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/SE6I32186787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e547f4fad884ad01b6c1401d2c0a781887c20935553a6163febecf94d1fced. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6I32186788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c35ad1b06da992b3ded26a83b274921ad4e36fcdd14458d56932a5905dc926d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US23A1571756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29fe5f34f6001c987f57041d4762ce2b59d74d02f4ba4f0775e840b8b8429c2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA52343869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ca8e980eb0d2b907228fb71e5d29aae9eb709b52a2e5651c89b3b1e362df74. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US23A1552009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4b872455e1151d25a4c66901fdd8739860e672ded09c292f92dbd57838bec6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ62117289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931edda068d040aafc330a34cd10f8dfeccd234e0702b55e7b8fcb73e35c8cc2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USL4R2054518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405096d16ffae5177d023c3703f3e1bb9d954efc16773df2bb4afcbea944e108. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN82059053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb40f07dec1c04b9b323a9c27d51812103d58cd6802c47af3b52f41b0cf52ef9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5752097149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ed47a4b9596bdefbc5afb32cda4e82c3d9e61bfd1b9ba8900ad97d1be4c00c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFYZ2099167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37afb805517ce978785a6debd06e4aaf97f75204fc223eb95ca0a4cf0da9aca0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ61922544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc0783dac3a2415da7e8d1ad68e0f9e90fdff422be88541177fe33ec8c0fcb7. 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/SE6A91870930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c3459d5aab39b833e848c3f19bb4460d58c3e4300fa7fbfa11e04533f23510. 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/GBMA21963375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f2343aa05be53fdd1dec134c4aa01f2244e9faaa719789da05093b472cbc1e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE5BU1953701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f2343aa05be53fdd1dec134c4aa01f2244e9faaa719789da05093b472cbc1e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE5BU1953701.