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 0xe0ccc6e13d51876d64eff6ee18b1386727f2dafc0f49921ea4894798b7e13d53. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd374b07-da33-43aa-acc1-b2e5c63028d5.json and https://artists.proofprofile.net/proofs/artist/bd374b07-da33-43aa-acc1-b2e5c63028d5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fbd7b07504a4d6bf38123b3fd75cb9bc80295fe9222a6734a9f4d485067097. 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/GBFVJ1600163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc7ed4742d3285bae801ca694b49a560df4a0bec2ed63383320f28e97b0fe55. 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/GBFVJ1600164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbfef80dc5ae5648e4676c64ca91f99dbdfe775da5c69534c1dc183b6a4601f. 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/GBFVJ1600165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2343fbab921c87f235fd9b8fa5c445b8d13720ab898cadd16d70ab70e25e92b. Chain 2 (Bitcoin): anchored in block 957304 (2026-07-09T12:19:34Z), 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/GBFVJ1600166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250a5a356fb31e7784c2d1d917d1d196a4a76a4df021b1c7e29697915b2de2f9. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GBFVJ1600167.
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 0x59bd9ca5cfef53e5242fe9d275fce1bfdbe2baa01a7f19eb133ee33afb0adcc9. 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/GBFVJ1600170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396ca112831444cc31b43f61c3ebed7c8e4eca2f013144b5f3e25c6a56963464. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/GBFVJ1600116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89e87caecb8a2ca8ef313d09bea1f03a5e385da6cb33d071466bc2f4fbacadc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBFVJ1600117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ebe86512e7545717ea11e645c9bb0da322f8e0559de95a88af7987092fcd3a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBFVJ1600119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4b2c0f4cc8091eb899261f94fb360bb3ecfdb09c892bb1c4ab1773c1f2c2c3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBFVJ1600121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad639888bdb79e6f3751e0912b2ce63afd8087587418ba00b0e9e0e8188f99e0. 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/GBFVJ1600125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216891bc3345f315aafddbcf56f97010c88d9be3a78c05c212230a11b9584daf. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBFVJ1600126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb7ecb44bfd183db1a7c8964323008d0be24ec74cb60d31a59d9b935fcec979. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBFVJ1600127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b674a2ab0ff57fc2ac0ee0f09d617ff801385e7946689abd7e7c59ae1f87203. 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/GBFVJ1600129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3141cf02261b87a1402481642e5c4b842405105907c8d7a13cf6968e559abca7. 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/GBFVJ1600120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7d601066a5c5b68d427b929c1b206c2634e8892695606176c1ccb9ff711019. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/GBFVJ1600122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3b0796046f476d7294dc3a6d9bfec79907649989b35122bdbdc248c830f9dd. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBFVJ1600123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7428d2d6c5ba99eabe61386feb8e15f2f5890a1007eefa3043ca80e572bde65. 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/GBFVJ1600124.
Live At Parkhof Alkmaar Holland 18/09/1988