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 0xe2724ed11b61fd88ed9b2373d62bb4de6318c1697adaf2c3b8b9a0aee42d0dad. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/190e54ea-7399-4749-86e0-effc9ec30fea.json and https://artists.proofprofile.net/proofs/artist/190e54ea-7399-4749-86e0-effc9ec30fea.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 0xcd34dc4eba72b193dba244ec2dd30f0c21fc8fa491048fd7fc5367ed6b9a783f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:08:26Z), 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/NLE870705701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a7a48c3a77001d5e91bd9fa793bd0cb6a9837da040c2b00ecb875c5c1487d1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLE870811503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c84736b599474533e37049eeeeece2165808f8d6434b96304352af8e575dc8c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:31:55Z), 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/NLE871210001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ab60e42da9badbc83ebb003a361c2d3608937da12494621caa56efc20ef5e0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:04Z), 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/NLE871210002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852ef87314f3b4f7bffdb723fdaeca2088cdf4970a5b175c94cbc7b3ee7d51c8. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/NLE871290001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7482c1308273a6f5dec5adbea2df7885e3863c9ea0d9c00bedb62d814a8b6e3e. 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/NLG8X1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9d6c7f457e12a90ff488d9814ee2a15e9cdb0d66d037b2b68b668bcabe4fa0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLV3Y1700004.
Zie je al die vlaggen hangen (koningslied)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede49a47da79c223ed5e9ddf4a7970ebce9eea5749fe63878187f96cf37775f1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:22Z), 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/NLG8X2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ec280a09204e1753169c05902b2f1d4f09b01c8550b86adfc1a56e786e35c4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLE3R2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3bf923c7a6657fb5f506711e524c59e3b938849338dd4f4c120326058cf28a. 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/NLGX82100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a56ef871879d33c709ec13185bd5f84cb7f6e8b317dc2d27aa3bec7ac11d58. 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/NLGX82300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa20c0bdff0dabecf72c22744c52f32e1f6a74dd716fde2bc099ca88ff63270a. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/NLGX82400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a29fb0f9968ecd107450f3afa4ee7b93ffc67530c2a8513d6f1a68c99d7926. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLGX82500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fb27fae8f18df6f50ff777e8c7358353a5b8ee262704a91a3c35ea6f576897. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:25:35Z), 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/NLGBX2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16315539162f985b2a5b57dd31346868cbaab5412ec5588921c356d6c7c3f349. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:17:21Z), 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/NLGBX2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf55677c8255702e36ee1d12b0396bd825e3b802b8f0398649804cf361ae470. 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/NLGBX2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f37e88044296ec70ff4389bc3bc8dc4430fdba727052a5842f6a99f6fe95792. 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/NLE870811502.