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 0xeaf009f032085dfc25b137148446827529091b830ddd2570c5089227c8554344. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/faef3b39-349e-4f4e-923a-33683a4e6457.json and https://artists.proofprofile.net/proofs/artist/faef3b39-349e-4f4e-923a-33683a4e6457.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 0xf56226df29ec82551c2462bb3ecce167bd8bfcf3150a3dcf7a8eb396d5120b2b. 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/ES5152101194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b37ba34050f6ebc966ac99a7c65efb1adcbc4a7536e0c579dc550aba8b1a67. 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/TCAFX2101256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a75c5fd5493c0d9093c5da89f0be479d140eb663d75c9d9ead5684a1f025c0. 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/TCAFX2101259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0db66c6d7d1466515422b808b83c67212a0dc0d086413d6443a773ad170fb9f. 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/TCAFX2101260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb024c30938f23409ecc86b5691590e4af0a63acdbeab5a26fa018497784e9ad8. 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/TCAFX2101263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50533f5670bf53487137b856bfc204bb4cd90e01a2d6c0b7c6d0ed1de518517b. 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/TCAFX2101266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e0785a3d9f1f2db572ae2bd151a6e647571350758f9d3b437ed8d468a9dc17. 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/TCAFX2101282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b53d25ab105dcc67f1fb3e7d6b2116b88730e8328b9fdc918cd7b7b66d5937. 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/TCAFX2101329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d8b5ac8cc377396224b3b4409df09c7cea34ae523a5517dd712b83f77a0f4d. 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/TCAFX2101342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278329b4b2e9ac021bce2b77db3b2c4ccdac9ac2f495d45e340e8afb4ed7512c. 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/TCAFX2101357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5515dfd4cbbf62a84ad17444492a18ad3a5755471aef77b67c6419659c0e96. 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/TCAFX2101362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41b981dfa44d9b368aa71a3314499be7f64f18ea491bb4fbfe9f2fc301cf2f2. 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/TCAFX2101372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e8532b62a13ad372e8f63e57b76d5b1f4e0183122f814ad4f5f73372c3a1df. 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/TCAFX2101387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070b961c580228e7347f701f708ee308addbbf35db9193b63de38e2ed5800539. 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/TCAFX2101389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1b21be93e0e3c256ed4e18ecd99811b9452e063bf18b952856ae49f28c1cd2. 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/TCAFX2101392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000126d46c0522cb71bfa7c1387bd174c160049ecf0b043893fde6bed96e99f5. 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/TCAFX2101396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca47b9b432fd74f180b235273757172cfdcb24707927af4432d35960b34856b. 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/TCAFX2101397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f33a7a8bd3e0c0c8d65feb23a6cd1317e749e0835e4c5484d0597b19b570a1. 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/TCAFX2101402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331d22b25b8cfac8830f8ff1f44c8a884763c533c88d092b6f0acb7e7d58d196. 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/TCAFX2101406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4deb66c0f394ede79ffb13465ae5d30c3edd195e2e765dbe81bd888ce9757f. 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/TCAFX2101421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618078c9df6da9807602f1a2d05d91fe5e3b00bd2ed97ab2532b0c1d0a80db34. 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/TCAFX2101424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2196102006bfa25a40d47fcf8aff6626bb534e381d862dcd7155a4c71e25b46. 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/TCAFX2101437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cc9482dd02376a912b379f58586a4fea0b7df8ca58f8ae0253665ae1277739. 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/TCAFX2101443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0592fa13bde7ab6622bc5acf0872ba39233f8d959fd1408c6686fa45a23cec36. 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/TCAFX2101449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47dc1be4a799b8435b1b1bd0aedc8e8bc3efc9a846a6f81b83488ebb443cba8. 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/TCAFX2101455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886a29afed8773a33fef857f8a6236208873f658d8f74f96e5d87d55c476c56d. 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/TCAFX2101460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fe79dd232a88f7bf9105d2846400430fcf1c4e99908bed49604bab02d11a25. 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/MX2832099893.