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 0xade5792eff4a2be7f0fb2fa67cf7bdc4a65db0493f3cead1f8a1613ff54e1de9. 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/d541cbf4-2658-4776-b3f9-924a9650c26e.json and https://artists.proofprofile.net/proofs/artist/d541cbf4-2658-4776-b3f9-924a9650c26e.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 0x8109c88fc42339dcb80934a0eaacdfda5839638174be39ca53c4aa77b3a7130b. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QMDA72348578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75feb78873fa645acb317d17fe6747eae067c5f60a7dfd9091c71b2e59c8984. 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/QZWDE2248807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c2c68b39196a361a5906928a0b2d1b7a52ddfc59c2680f5855e534283fdf2f. 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/USLZJ2337684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab31707f349db316680d050b0b6b2f3692cc84bc108d7e0e50ee92fafa8b390d. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZNJX2400517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04de2698872e83297ad549fd8001f0f3bc7912445a0f5a97cfe35b05322f7e07. 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/QZTV32402469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317e5d345b4114fe9903c565f69b6ed861a676a9201fc205eda63ed138d6ed99. 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/QZ5FN2457357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605f61a3e0ab4cbf1c7dbad6a467f9badaed41ed6be40b627a4964fa1f063237. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZKDT2400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915281c0fd9c7b1a341085900b34b06351fa6d487a3235d3f4ee414283a0ae0c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBRKQ2472532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5c95a7899ca09ed7b4ce406a3808982ff81165a521dbe0659e96a43e6567b0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USLZJ2440329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136e5a2342eb5b3b3e524916bcbadebe1b6b37ddc886b3ef116ea39e2d2abe90. 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/USLZJ2405792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6f8ad165ea0349eb54cd54ab675b6611f8ea8f0b39edf506bec63a67563e02. 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/QZ5FN2471368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd2a1e459a4a953bcad91538cdb5e66c376b90f9e23c7e75235667097f93fd4. 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/QZ5FN2449645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0b49fb341d60cce58d1af98b21369769c81d389b4740278b0dd093927b29f2. 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/QZWDD2388331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7de71f0cfab5758738ecb6e4583c4fce1e48dba0bb33280badb200661e360d9. 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/QZWDD2373703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef847b6cd27d7a5cb7a772dbca19eedc92bb50074029d9b0c8a3c0cd8ca5686e. 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/QZWDD2353706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5288c8bd7e35796a396ff4ee0f83a32e248ee3d5e77455dced0d3bf8f75233af. 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/QZTV32303947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572a6ad422ff5c407546e579714d1bf06ea417c1ee1c84b896b07e5ad628f824. 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/GBWUL2397461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6172308bd57647d7094dc8035fa9892cc84f073c3712aa7cfdf9092fa1e376e5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBWUL2397489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa73f383943ed0ca5888dd18bd17500470993ac4fc74253cf3b0a42e832695f. 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/QZTRX2355824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb486e064a7addcd2ffd596dce60a55bc5fce9889f3dd3ed8825d2a459fc6132e. 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/QM4TX2393047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871bec5d4a28c32c480c0f94b024579e413dae3193085901b650550887f2180a. 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/QZ5FN2330162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc3b203783344018830c1ce5c54759ae532fb90454a8b8337db74357b255983. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZKDT2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba67b72ee3e0cc52a9eb57200d7622808afa04d0593814c51c9aec7b282f7adc. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZ5FN2300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b37ec8084d1a5310ce90e165e9b8df24ee8cc322a094d3a71d2e2d664ee81c. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZW9N2246321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b174c1e4504938445cf97259a1f26d799e280eaa1ad6828eba624b9490a1fb. 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/QZWDE2238323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05db72da307b6aba8c8929b119c4eee4ea4a876c6e12d6e2eb55e1670c7ad694. 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/QZWDD2272605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070c0354128d3e31e17beea7108d373c88edbe05414c3466e581abf2afe4679e. 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/QZWDD2247417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7ee472bde246ec5bb218e6b83d576f8e778e68cda54cb2fbecb03cb2e60e50. 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/QZWDD2244457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4a49d27b0a0afdf5c1384d6380e58627af26e14b0e1c77dcf82ebdbcacbbe4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWDD2227783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9977648285b2cb3df1fddb8e9e8f12693cf6e4a886262ee9c95fc1850cfa5e27. 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/QZDQH2265470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79c14e7c0624ede4fe49a3c3ff27a7ab469df052d0e2d67391bd0957f0cb763. 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/QZWDD2204887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223a22dcbe3101cb9c6de2dc5e164cfc3378921042ca0c7317a9e7e46c129f8c. 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/QZTV32222330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fdefa42070d5183ca2fe99ed30943cada51741c6e5c0614b64f7ecce3c260b. 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/QZTRX2275283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4db257ce84ae1acd4a01f52da13bb2970e941921b39844e61b4d81a823b1c9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZTRX2237127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9a8dbfdbc8be070ae4229307810f05689e39678923b6156f60bc10cb89c5f6. 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/QZTRX2237584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c23c8cb230bfc99a5b770e60d4580625474ef97197f05c0dee3f940fa52d9e. 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/QZTRX2203029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729296d3d6ad6356ce494602c0542498c783426050e35711e2aeb03fb6f338d5. 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/QM4TX2356010.