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 0x32b0c76238b66d5e3b47d3f27f4b4fa5dbbec23c1dd3a4fd0e55f894cdfd72e9. Chain 2 (Bitcoin): anchored in block 953932 (2026-06-16T11:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f5216a8-0c82-4996-a6cc-b74a91aa2184.json and https://artists.proofprofile.net/proofs/artist/1f5216a8-0c82-4996-a6cc-b74a91aa2184.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 0xfc217b8d6acd1d140d055cfdb873835bead1b4de90200a6976b6fdc246e7aba1. 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/TR0150800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac07bc63a14adf35e853e18c24aeb2c4d6600177a274835458ad7664467750e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TR0150800068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a01a11599eb4c845ab84a31cf8408fa8ea44b429623dae5f355d8987580f3e. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TR0150800077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbcd23bdaaec989f50f0429d882d06057329fc54effc1fcb5030c4b96c67d3b. 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/TRARD1800075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdd33a0ba21039539e0bd31dc1ca74099983a13a1ceea836caeaba2268d4581. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TR0361900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caf85874b3c944beba032377fe63468a89eda782bf5fa8c537ffc670c0a890d. 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/TR0361900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b3920130b65c873b5ee503fe50e7453071fa91934a714f445347a37e0cbbf9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TR0361900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c47d98f892ff368135baf64196632249de966fc50e871844f40e3a431ab92c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TR0361900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74448d2feb32604eed38711f3a31c6845ebdb9aac2f1c22493860dc664697ca3. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TR0361900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f643552cd11d1d292ef2326d8b8cd987677274be6eaa305a149faca6906ee3. 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/TR0361900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c75de58a334fb4cda2f0f2c36df43881549fd15f5321f66df6d16a9a1222b1b. 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/TR0361900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7cbb0cee60e4a9dfa1c36f570806d23d22d15fb96e1faebbd616a018bddea7. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TR0361900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12816357b89950e1671721621fe1344e6293c9b191fdeee989a1ed3ada7f44d9. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/TR0361900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1ab9e46af6ca414d138d74150e0a23c0a3574f6596dd2455170b9902cc9184. 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/TR0361900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bd37e98aa950f2c8379f4438c99e90811831b610e76ee29edf834c29ffd90a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TR0361900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8f0154f29400117cf83743a15d3ce5146768af090d8fbf4c5fc3a391c4f8f6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TR0361900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5724636a9b782bc9cdd01176c518e9b4c62a8ab011fc5727d054986879f147. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TR0361900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03188c326265752dbb0405a8b2203ac6af0b1e93d0abf1d3eef4bcf7a7b3615b. 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/TR0361900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b6fcf66fb9405bf1474d0ddc4004ece2870db9947312add64ee34a3fb1b1be. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/TR0361900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0660ba4d2a01e62405845b03a4e9adb9c159c530f79b244cbda12ad7827f4949. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/TR0361900002.