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 0xc9d897716466d1f783100b6aa47f69ea08be37053aa917932b9f78d9ca2d892e. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba791101-9e14-4c6b-8bd3-b8caf99523b9.json and https://artists.proofprofile.net/proofs/artist/ba791101-9e14-4c6b-8bd3-b8caf99523b9.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 0x74d38e45aa4365e3a509e5d66790050725834f573d4b438277f7a82d4e0ab583. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/GRIE11600143.
Leap of Faith (Sillyboy's Ghost Relatives Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a689c5f4f368a1e38c448bb0d73289ee5dc7f2671826a16e56c408676dcd5a2. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:23:25Z), 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/QM4TW1945581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820a86caa68caecd83fbd252e109d3e4649d28174fe27046021002299952209f. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QM4TW1857614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a689c5f4f368a1e38c448bb0d73289ee5dc7f2671826a16e56c408676dcd5a2. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:49:45Z), 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/QM4TW1945581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820a86caa68caecd83fbd252e109d3e4649d28174fe27046021002299952209f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:07:27Z), 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/QM4TW1857614.
The Girl's on Fire (Lessie Zmorr Fire Alarm Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88c8a5fe7c8cff86e642a3afcc622f5ac0ff9ee5f286e86385d0737dd78572e. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/GRUWF2100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b88da6dad2dde36446962c032072aa417ef7ca279179b44488d7d203d5b4afb. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GRUWF2100055.
Pigeons Are Dying, When the City is On Fire (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a2cb853d0985e2c9c3bd4c3365f7bd7e29468167bfa205ddba14b16e3cc4c4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QMDA72493784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422fe5c3bac80e6eef2a1bc22bd8926af231734894f8a30c0bd38c3f82689640. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMDA72493785.
Tin Pio Zesti Mera Tou Hronou - Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab44a421af0d000a45537cdf1235331df454ee28e900ae19865b3d43358f66b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMDA72493786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6283378222910025321cac13694797bde4e051fe145f0c5614c8b95cab0f4f. 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/GRUM72201138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b088570fae4f6c00dbcff9d5616d0fac1fa48e4086c603806b09b3ed6bab8f0. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM7282009993.
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