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 0x70238c09cfab1f489323bade397e3228991e065d542917274231c4419904d028. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b59d890b-7084-45cb-ae98-62bafc88837b.json and https://artists.proofprofile.net/proofs/artist/b59d890b-7084-45cb-ae98-62bafc88837b.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 0xcb4c771e1ed119732677ab3ef42f4aab8adcba07a6f72ee2066cff3010a228e2. 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/QZGWX2057169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763eff232d8da44f63ab4ef58859c7497717a98275c92c40440610d4f1e0521c. 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/QZGWX2057170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5497c44d71bae95cdf4c4468c0091a5ae0ce8a3d9374ede18d7208881ab2cc. 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/QZGWX2057171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf666b1d2bb20e76237543c4f9b5b1b90aa7109fa30946b35d27bc88ce9400d03. 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/QZGWX2057172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bca06636481eb7d0e033b2a1f4e4e8b0372614a740e74cca509e4247bd26e99. 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/QZGWX2057173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ad01fbe77d87da2b151bbdb55d6a31135414691d067474b6811956b9c5adc6. 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/QZGWX2057174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd733c820391a75cd3adeaea4e9308bf92a389234bfb76dc2c69516f52ff8b24. 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/QZGWX2057175.
Passing in the Night Like the Wind in the Trees
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37e8c558c630594a7539ff3f02c2a5503764356d89b25491000c2c2afe9b9e8. 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/QZGWX2057176.
Gentle Pleasurable Rumbling of Traffic Overnight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3344119e1a92f5eaa539648ac4b4ed26a44be682218ccfef68e0ab33b11be6af. 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/QZGWX2057177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3be53458474fb40f571b000aaba7d7332d99a33ea79574a57d2f54c3243012. 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/QZGWX2057178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95d31d6dc838728688ed3570307e61557465e46c3c4a269c5bf52d08324e24a. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZ22B2077574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01b17e6847e1e6674b40e826847446f45d6f56846c26660bb8ad282d39b1609. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZ22B2077575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecf66d0210afbd74a327e2096960e4b9657ccf5a13a9d7f9adf7441bb178a06. 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/QZ22B2077576.
Multiple Lightning Strikes During the Thunderstorm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b685f98d1b75010b3b0444575ff4e7eec367dddf0dc63da95b0c2000b6c054. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ22B2077577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e33457161ea9ea63447166a7e8cd66bdeebdf38015f25e4b1bd54dfc508655. 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/QZ22B2077578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a089215ed8b924ce450ca699f948dce041551ba732bc66ac5a6f268af6e8bd. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZ22B2077579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635abf0186d4b48f3835b46b57427558db9fa2364a00d4758efa7f018e49fec6. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZ22B2077582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78cc7aa339063a7e7300ce8abd33cc636369f8727cee89b3008bb99ed8d6b17. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/QZ22B2077583.