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 0xece23bfd9041089fdfc28e3137f4276f30150175c662e40236f9f88c63c2ff40. 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/57a10f11-26f2-4e78-b2da-2586da9b0154.json and https://artists.proofprofile.net/proofs/artist/57a10f11-26f2-4e78-b2da-2586da9b0154.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 0x7a2b01af7a14549d712f8df616c7b0dc96736ecc7ef764779e7f344ada262f3e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/JPKI01517433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed584558016dd4656a9f7410d750ce007a99102ed337cc3a44fe51e6ec4b2890. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/JPKI01517933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25bdeab16fe21dfc39581673bc9739ca95891e0dd31512c22f5b2c73fa44daa. 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/JPKI01520671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfca62d91b5348fa7c88c03162a93181920d70999a1336685a903ea1b58b901. 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/JPKI01611800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcd0784fad0c66719f1357a5f4ed62198cfd60fea7e71541256f4c5e713e1d4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPKI01612350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380ea045fb170a0ffa6192562115068a42b704a635e23919b44a6160d79b1150. 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/JPKI01613679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9257bca218c11bfc32f0522535773b88e63c15015038e6d6bbf9d5c919d79724. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/JPKI01613680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5a13863e058473ea7cc7183df48ac4e3f29c1fdc97957445d9a6f6b23b4d24. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/JPKI01618141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626617e37cb34bda80a2be816a0180c826378ffa17a969dcf717acd840ddd9c0. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/JPKI01619480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51711aaca97faffa8a9cb81bf41a9356e0d3d3312a4837c507f3facc12aae261. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/JPKI01620919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24789469c214a4af293d760dadea0624df05f804f15c8962839a6d91ca689174. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/JPKI01710882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ee0d4049eed952b59a16f3ea2d3da8d5051064c2a83b574d8aec23f77d6f4b. 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/TCJPI1822711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa283f91a226e42b65b443e8213f0ecfd5be3e9b2c95ba5e0d7b7fa4ccad918. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCJPO2180124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9a3b7938eb6082c01846598f5a7f020971537deae87ed4ebe60d20c065fe3f. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/JPN902101560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f40029b125f94b3b8fbc16ddf126155874abc7c30b7181b14c4b58b2b8b8155. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/JPN902102010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8ed59cf0ddf4030aeb86bbbe9cda9ed0e92264ca50b035e70d81bbfc92b874. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/JPN902102940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e01e7e543ffa7640c53d35cd5b1ac6a7f49737f05e5bcc3e69df72b6d64a5f6. 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/JPN902103130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed07c87f92b15d0f33a96b4e4d7ab2d77c98bf2f801dd7018ba5371acfd83de. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/JPN902103350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0f4cf5a9ff2ec4c749c686d035c346a6d5ec02b2978aef7579d001adf001ef. 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/JPN902103470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9955d4c3624e2cad519fbe683402ddf1488758e60e63cb0ab9818caf4dab805b. 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/JPN902200470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b20c3e3a559c676f2d122dc097fd7ee1175df171b05a43fcdd5fe04609b77c. 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/JPN902200600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d25275d9e037e74e2c86fcdafa24fcad3dd4beae1d873c059f8c9cb2c18e0c. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/JPN902200610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2bb62158df5e874aeeeddd6735cce70b9ce1d9fcdb3f3ba6574bc0fe2b981c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/JPN902202700.