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 0xb582a25566d933ddd0606acc6c1c39271c4c5d89c1a30de9216ddc5e62cc47f9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ff8916e-1c95-4a0f-8be1-aa257272146f.json and https://artists.proofprofile.net/proofs/artist/4ff8916e-1c95-4a0f-8be1-aa257272146f.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 0x170adbc91e92541ea6b6371d0f1f53b84bd8c99cc9edd06966028f18c9acedc7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AR3M71800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081b6557cf79c8caa8817f112cccfd809f4248c9b1383aecf602edafdf353b68. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/AR3M71800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d708f126cbaaa70e23b85d46ce42e2c3f3e691aafe31d19afb3e833ea0d9b9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AR3M71800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda29a9ea6f0a667329c84245a21ee2c47dfd3d3abc2d5199a85ad5782c46f7f9. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:09:12Z), 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/QZHZ41900611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8746c4355dc90a78170b549635179966704ad07435d33b4c9540f23c11c89692. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZHZ41900612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdab6f8f8b69c019d0932a3e0a294735d1dff6193e8e4ba92ca877d5da4239f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHZ41900613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb77ed47ab1ad2f8d701677dbf8dcd307d168893f37bbc6173332ec824e7fd1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHZ41900615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7571c946b06fc5dd7babae3bcccbf0baff9a1067857c4a40c46dbf8455fee7a. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZNJX2122353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e680ab5a779f3e2c9d6056cf44c5ea7f9a2a3304795c469f32941ba6f4445a9. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZNJX2122355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ab7a33cbbd87de937e8d011e896832ee73685dda63cd48577fe05a11be205c. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZNJX2122356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7966dc6cd19f14bf5201987fca5700b1ae789a90b9711ec88776d95056e69507. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJX2122357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacbd2f15ae173471117089d35a66120e8511b4b278f9d48a3364fe63c455f59. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZW9L2325824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c80074ab8ce005fcf6fa402ea316dc5ebd6f50befb0775120393a64dc9a54e4. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZW9L2325828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f08d0fc88cf57393a43f515d437e0b5d352d4c3dc2501ac7b463d5067fc31db. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:57:28Z), 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/QZW9L2325829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7d0d0b880c1d5645ed6d2ff7b5fe09fabce512e59cf82c1cbf70e1f4850ab5. 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/QZW9L2325830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf39454abd6ca41f3e3a094c50da503cf56d0b11aac6987f206313215536eab3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZW9L2325831.