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 0x4b0ff9587500afe4d632edce127a931635420221d5afe4920638945471a7bcdf. Chain 2 (Bitcoin): anchored in block 954058 (2026-06-17T06:34:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45a3c716-3e18-4f5b-8433-2f09125c67e5.json and https://artists.proofprofile.net/proofs/artist/45a3c716-3e18-4f5b-8433-2f09125c67e5.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 0x95dabef1278c9e4972d4e7947de821b2d5a3c2d9fcf0d2f381f9d4175c16174f. 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/US83Z2127814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b9bbd6b5ce158f13d60a7b71279eb79525d6f7b7bfafbc044575edf04ec2ff. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/US83Z2127815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781ebdcfc5be151971256a95ee5b8cdb003f5d56cd19c7cef2687794a76932a9. 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/US83Z2127816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3e7dd061c90d96041a120f53ff05e1dcacdc60b8c4b66191d8a05d341303d8. 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/US83Z2127817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9661cd1a5a5895209f46c5e170c9726791747df7f5ad2a79d128c1e2d26f0f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US83Z2127818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a3fa14cf06f3a308287510c50cea12ad1737f567542de85970d1bd836de161. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEAR42086356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb285782dfac7a2833f9090ef62f047d2388e97ed421d60a305d7d4a40d0d521f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEAR42086260.
Revenge of the Zauneidechse - KOLOMIN Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e488806ad4628c7a52c6e5301d8a2610dff9a42807ed4303edbc35cca1ccf7. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US83Z1915623.
Revenge of the Zauneidechse - Al-Jive Mestizo Meets Kyem Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082d9d3886bee176685298cfdfdb21e80037d8f753e31de7267bb2ef55672fc2. 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/US83Z1915626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0d48e2ca6ceda9d9a563515b5db40effbb8ac0182a7b23e71238d139b85fe4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/US83Z2027574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bf87c095988b0203785f479d3bb98ef9d93efe86d208053299aeda06fccbab. 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/US83Z2027579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897bfea5407accee8f3176f2e4bac7e5ff0233223ea0e8cc319bf1205b939b8c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US83Z2027557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608749a9cca454f6f4779e2f4bd596fade6f200bb871b567a39c8b86286b556d. 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/US83Z2027577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d1ee0d173a30e5b5478bea5c132cc8fd01a34edcf8ea1ee9a52393be4e1dbf. 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/US83Z2027564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc243bf4e50b6edabb19775890a5554bb355d03a53c047e07b60eaba8dfd27a2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US83Z2027584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd213ed268344cfb86d4079bfa0848d4d8b9c110bced59582a78ed56a20331f9f. 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/CHB481700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bb16364554b9abd4ce58fb39aa4cf833be3309dc6391925666ef461c84bdd2. 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/DEAR41785170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76709316419a4e8051beda37a5a45e58f8e6adde156f85950cf33861a41d448. 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/DEAR41776284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4af4eed4c33279c188502c5834b586b56e4707922193754ccd717ad1c4d5358. 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/DEAR41777091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e83da64089308ca70104956872bb6cc87feee8ad4fd822410248236d23c7834. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DEAR41718140.
Your Love - Poediction & A-motion Source Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fa1ca9acd1f0508820a4d9cbea3bb135ce35c10da45eb4335d17eb1c3aceb5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEAR41774382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7b91815ac4862f32961529aa86e139f9c7a9024b0e4d54614e729c72f6a894. 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/DEAR41772058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bab5af91eeb367d67bf71743ae80513ed86f042696f2f92652e7793cd2be0c. 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/DEAR41735663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ae2a5f7e3acfb50066d1d12a2ff82c3a64c53334020f46c8e16777937e8c41. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SEYOK2112940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ae1c38581cf135b70c2f5a2c599e96144af1bbeb28790bf92693dbace85240. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SEYOK2112945.