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 0xee1d3eee0c0855f097c19cde23011d1417bce51376a39009ac63f21d394c9ec1. 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/796687ca-bfd8-4d6e-a3c4-6d50e239a483.json and https://artists.proofprofile.net/proofs/artist/796687ca-bfd8-4d6e-a3c4-6d50e239a483.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 0x98437d04b27440f2a6eb8560f40307ee6d4da14b13188fbf01dfa473f0a04712. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/BX2M51800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9a891410a5787fa41817a81d2547cf8853af456fdc82e0d3513ae9d0b5c2da. 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/SE6QE2222910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7996aaea010bb87992e2f7832c2a662f673558d5f15e1302cc4f35715be4f2aa. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BX2M52200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea22fa778c23396848280edb6cf92be06b16a564ac5588fc5c93e3161a43dd8f. 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/BX2M52200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b47b6af50193374150fe99856ffeaa38f1819e5f5ab230c7d12ccf855feabcc. 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/BX2M52200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffa11d0f4f4d50cff169648418b10b0940c648e01199f91de259d74ed8af334. 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/BX2M52200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7996aaea010bb87992e2f7832c2a662f673558d5f15e1302cc4f35715be4f2aa. 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/BX2M52200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705ee0ec0bab10e39971030cad302333bebbbfeb56ec47d82f4a067053e0902e. 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/BX2M52100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695b46b48bca5ca8364eb39af500c93c4d6dbf324f93e0e7f563935354ff4067. 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/BX2M52100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9809a40df3daf28286ce05d2efdc4d00b83e30ff460eefe301dd6bb0dc3278. 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/BX2M52100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe884864fb6eb684ba717b672f1c2aaf7327dfb5439cf099b900c295ef9f26fb4. 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/BX2M52100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5a453fa0b4a1cd7371926b4b85daf392faf2a0b928d5aa9153c9e2f73f919a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/BX2M52300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53070ba0f729a97a59b55be78d0b271d47c35a93e955a24ea5ce6e14f16fa0b8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BX2M52300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb436410c05132160f1777ace70cb81f2a889971e1f5f5deb79048cf0b5bed68. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BX2M52400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8289ed60ea29b7df09d00ed09d1df331dacf7680450a86e7e1703a7963f614b8. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/BX2M52500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b7b7e5bb35d2d6ca360455ea41a7922579eae9daab7f8434874e276221c370. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US7VG2465010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb957e0275ce1d466b678aa9b4c525c086296351272451c2144b5a0c2f8d3fbd. 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/QZGLM2048989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8212b9f77f23783757d8636b98fc46ba0a7b49631c938c89982d5581f42e8d33. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZGLM2048990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6227af0d4174fc096782850043fd39b9aba009b907428b57742f65ae2340a2f6. 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/QZGLM2048991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f0f8c20652afeb31412a6f6f1e505e3330839957a12fe2b38dda123de2efcc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZGLM2048992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb837f0133778f4eece19f7f76288e1361510541fe21cb6e1e6c9a6903ca7ba. 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/BX2M52200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e32c8e14d6b8f2be848913bdb6d80ddde720138ca6f23f790de3f18d4230037. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE6I32218573.