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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1a2a395d511730aa8745ad3d88db5e7883b4631c59b327310e4f78fb9e7a75. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4853a0f-ccaf-4ff6-8122-80389a281b1f.json and https://artists.proofprofile.net/proofs/artist/d4853a0f-ccaf-4ff6-8122-80389a281b1f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hair (Alle Sangene Fra Den Danske Version Af Musical'en)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba520ca7b589e9aec6540ee0f2f919473497a29b168a08e8e34decc69198dc2. 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/SEVJH0902012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d68a2421f2ef42bcab46f0f954228ab9d25a59ea7d1d1eb771925e91061096. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEVJH0902019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ea22ba49a9eb533bc98b0ce9c5b0fdb9f1641794889cd43e770010e99ec3b3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEVJH0902020.
Vandrer I Rummet / Three, Five, Zero, Zero / Mennesket Er Et Mesterværk
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a535e403aade3c91120a5f62a0776d0b2968138ffc54153e152d16222fdc3c. 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/SEVJH0902022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde925b1394a7a910455be15cf1bbbf3c307d307bbad3f9072830e2418910872. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SEVJH0902001.
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 0x33a87492b226e67d877d0474d18ab38d0cb91795d699fbfce1ded73d7c32b6cf. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/SEVJH0902003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd218dc79465831f4b5838ebc0a0be22532aafa899b0b5d84cc6bdea0948af8ed. 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/SEVJH0902004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e12808d71b1ef617086bc52addcb432983a300620c9a79e772d7e9b2fe488a4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SEVJH0902005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8364dca7aa38dbf600a9104f1f9a48d4b8abc4506a9d2340aef18792b193f55. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/SEVJH0902008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ce42f7d18912bacef2680ce3336207700b8c0ebfb4cbc70ec10be6d425ec3a. Chain 2 (Bitcoin): anchored in block 960165 (2026-07-29T23:29:40Z), 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/SEVJH0902009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0df433653700e687c45fa1bf2f359adc459cd344e27e068e280d2298a56676. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/SEVJH0902010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7102f13dda040844ea4bf8c60c4bd1cd1a20841f7b7a9eb60a1803c36f17126. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/SEVJH0902014.