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 0xcd8757583a3eae9652654c77c6bc348e10622543cc3019fdf4715e50b4d63ec4. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ce5d1a0-3d19-4b19-b0e7-fee4c303eb51.json and https://artists.proofprofile.net/proofs/artist/3ce5d1a0-3d19-4b19-b0e7-fee4c303eb51.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 0xe972ac8a7b04b9abd37a2f8333a6fcb23954ac4cdee97550d01f0c101f06c695. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/US83Z2024736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366cf4943d4d93779de7b44ee02bd445c5292cb0e25732a9a2b5ab718fda8172. 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/US83Z2024737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d218ae648b34cc52ef01234473a9428f21fce266d42c3523f9bb10dcc1e9093. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US83Z2024739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d2a12244b685a539ee42e53daae257d8ba51ba3f2c35ae34231882ddd74caf. 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/CH6542039896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75196e8d2fe788f93537ff42d099211182bf748b957e1d93387c08977f9fee9c. 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/CH6542039895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d1cfb5addbefd20c2e9199480f57590561bbd755d91b246ce64fee80d4864a. 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/CH6542008736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c826eb160f238ce6c02e5c669f6e57ed0bc0fd048f1e254835d5f809ef2f092. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/CH6542008735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de7f329912cc2fe3f153e97f1bcadb6ce7eb367a2f93440a00a20ee19a65f7a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2046422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f45763a2df2dc09e4539cf1395098a07ddeb88007ed302b843324d78ceb6ce. 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/CA5KR2046430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78a1118123de2cf76549dcaf7865257412c6dab3af1f6ec2861899174218569. 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/CA5KR2046431.
Arche Goa, Vol. 4 (Die Psy-Trance Compilation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ff116d4f1d4fa8fafdabd7c1833cf6e02b5b7542dc2ab8d87913acf6905e16. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEAR41880106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecaa9f241c37777f831227cb6d90247f5d101c1fa7b693e99587ae419af61d3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CA5KR2104331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cae8b59dfa22e33af04d541c1108c25821be87f7e8d7df412c8862658d352a. 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/CA5KR2104334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6dc92a6ac1fa5787b80ad598cea0df87d317c81a900d737a98d55ca36d1e29a. 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/US83Z2036405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9ca798bf782fde488d81f7e627ea6ffeeb28185cc1f363bb7a6818a8acbd55. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US83Z2036406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7035e65f1f5f92d5906d8033178baee322f4cd3901d014803b0084b82ad3d67. 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/US83Z2036412.