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 0x88f5d876c21d68a0245c01908efb339a142cc563a1e96b95963b17c6b9b4df6b. 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/0941a42c-8277-498b-9f64-80da97ce99f8.json and https://artists.proofprofile.net/proofs/artist/0941a42c-8277-498b-9f64-80da97ce99f8.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 0x66536669f15c063ae9f7423d1c946e4032374c4812b3f51531577619817e0c9c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USAT20900187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4491b0787fa121449f4b7cfe9acd3e4fb5a3bd46efe70660cc50d0f84510f65. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USAT20900189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe0faba241fc7198cfaa413e497ae182faa53bc43db3e058917dcceed612a8a. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USAT20900190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fe7d66cf264c4001b2c5cacdf9779edfa7a594663e3be192b230f234c68755. 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/USAT20900191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f26e432ea6dbac9d2f1111391e4652681a340bb01fa15bd76e0b36b87b4d33. 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/USAT21101874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20850d9c774fdc13db0a8ee491c2862112754d790e3293f43fe5fadb7fa42abd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USAT21101876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0963f6d74528ca93870e4150bfb8dbe338bb12fc1cafb3e56e171fef8ef5d2f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USAT21000748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fe36ce1f5a1bdb8009172b45e6c9d70753da5161c93934891bff5bc7c2f94d. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USAT21000749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d70c02078a9504de141c4c32d244ead7c6e6216e687c63fd8dccc9d58287189. 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/USAT21000750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dc6798f3186b1c437694e6b9d1e678857c82c2e25596c68c7d2500f71d3e67. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USAT21000752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fe36ce1f5a1bdb8009172b45e6c9d70753da5161c93934891bff5bc7c2f94d. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/USAT21000749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b88102e100bed906a3e9d3acf3c31e0359f203df09f1df47e7d2b1ed4c9f723. 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/USAT21000751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b2653270b060821410206da0b641464b251ca097d40d47a5c04e4240933941. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USAT21000753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9567bcaec9767dc77a1c25c1e0f8858729929410b33f65e0f6354e2ad351632a. 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/USAT21000754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb907906628558ba38a4c26851eebf88202d6ac17abcf5640f2e87cf71a0c432. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USAT21000755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc1c24a6825be219f25650897d6025dc5bd59c3f5413397b1d2a935ec3e8a1e. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USAT21000756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c22666d920c1bc351e10702d9767099f270e7b2f44271d6e44d71d2cf756ee. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/USAT21000757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32f49766ebca5e5008e77774cbfd79ebbcd1091336b285f29509eef695b6c14. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USAT21000758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51fe9387f33f0cee5b6adb91726287e012e2170de8fe99ba78d6e44f4bee3d3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USAT21000759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25aa1ff49f0ee23921ac81b65c7d4a2479cfdef93493cad0e57aaf0505b36253. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USAT21000760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008b2e303e432bdf984203dc3d615e01dad8f803438b9f072884a7c252385927. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USAT21000761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbbbc8f7b9b99906b0cb1b552f210c1e490602148fa63bdfc3c74b24888197e. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/USAT21203283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0963f6d74528ca93870e4150bfb8dbe338bb12fc1cafb3e56e171fef8ef5d2f. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USAT21000748.