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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd914ea864831d4278e399628741a9e8c084f63fa93cbd434da858639c2c7e65. 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/965d703b-da21-4569-827a-a84ad0043de7.json and https://artists.proofprofile.net/proofs/artist/965d703b-da21-4569-827a-a84ad0043de7.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a581c476d122f8ecc5979daad71f63851cdc3864bf0344855e79540f7a4861. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZDA82407398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde136d06beecbba2abee9a798d1d6635e08cc7606535e196140829dfb4f7a041. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZDA82407399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e70393d81ae4ae81ca842475cc385dbcc073245cf2f1080d0017d35726bea2a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDA82407400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082539ce8ed4a2b385e4872024b6b61f02bd0363092116c53d49f17af99531f4. 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/QZDA82407401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc108d9b42c278a744ad465715362540f67926ab33dad9aed481f499019402a. 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/QZDA82407402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1a54afb15d95f52521c91015d8299c59b34ebc256d53780931ab690c52c82e. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZDA82407403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08061d933150d75e6d8e017f1a184e69a549072645886de4be91952a9850b15. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA82407404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3342c4b7a103873a4bff4481fa0419fece558987411c30de832127dd13444a52. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA82407405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399404f41478f419c2f2b7c19d87b18fcdf227062c62b54beb7ae6d9c94b1e63. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZDA82407406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7b2f0d35dd6facf7e4d756de7c8bb083207b0a037b49fac8b64c3aa8534a7c. 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/QZDA82407407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c3bda285648502e49e058e761b0075c44ab435e62ccfe533018d9bde033d23. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZHN32425844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198a9d5f5bade161b62fd7b1472330241874c77bf55ea4112011e806d09c94bd. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZHN32425845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446dcb217def8bcec7edae3dd94f159fa1c65817369c87756f4c75dd4509be62. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZHN32425846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c104a4b8118ddc9ea207476e5b0ac771e5ca03d5acaaf8ac0ecc8a21c0b6699. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN32425847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61137ddb95314a3f96519488ddbe56eb83c4ace0c8224876318903305ad2d965. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZHN32425848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51af6c232277d2eb4351d9f37f573ce101fd7b4fd43db6eb6df6ea8f9ec3a417. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZHN32425849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfc38b82e76960683b2e1f76d407fbe7084d6be40f7eb2d80086d3f218e0e64. 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/QZHN32425850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60c67ccad79da0b9d36aebf1e9b8620317b58fd1eef08a98bf174b759b6801c. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZHN32425851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa775fd0aece0a0d3b9682863b6d815f294597091708879d8392572ee4b8f7c22. 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/QZHN32425852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd129f4ce6cbfc95200afe6ee489fc2849341c93f136d15c3bc4b0e17d4352db4. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZHN32425853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c17008302551744317de24e3e69156873eb817175279c485124667daef7e39c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWW2494540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98cbadd5d37679a3889a13b865c48d503f7d7c7ed767906fe22477f741cbfd4. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZNWW2494542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee98e3ad3bcc573a1e9ccee27f31a100677b9a792355ac6d411e9dac0407021. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZNWW2494543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564297155c5262995e2a6d88bb4f495929f16013db2863f0f0fe17c6c1ceecf9. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZNWW2494544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665764fb38123bef7ee1945deac4832c063114fc8267756b5a3b59e639e60aad. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZNWW2494545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff0c808e84bdb73d6c8c80536f8a8334f16e237692e5e94c5c6013512060418. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZNWW2494547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa025463457afabb538b59eea2eb3215eb93a58a7461bad90b3cc4dd141362e1a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3EY2442705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9f8c6f94794ba366356cb1d530fbd3e02d20c2bf6fa8b311ef46a8269c6c04. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QT3EY2442706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34e0868df360edb82ec0016a894faab9d818ba14136c04568335d8541552b61. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QT3EY2442707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fcf397dbc42f79e05a5a7bf402b3d5f816d024ad0ca0888851020a83b3f62b. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QT3EY2442708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48409507f2adf01f6d9fc9bb24b3a9f6d3acc38828cce213f958917c789fe38d. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QT3EY2442709.