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 0x47c5755016b531f1af1defe395376b53b5a4354d2de258dd211f2e8d72177758. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ce61ee7-973b-46c7-9298-c124dd2c0d3d.json and https://artists.proofprofile.net/proofs/artist/3ce61ee7-973b-46c7-9298-c124dd2c0d3d.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 0xf6b5584419e6449a7a9c844c0118cc93c115a172c58fd162402bef9f969b88c1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/NLA241700536.
Ik wandel in het licht met Jezus - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d43e3174d90a9ff5498cd9766cdeb018c06f347387596a5541bdcebcb70aa6f. 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/NLG620573614.
Eens, als de bazuinen klinken - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e53bf6edc6f1072603685f56a434baf5472b1fcc5121239aaa1490d0bbe76f8. 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/NLG620573613.
Vaste Rots van mijn behoud - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a21a429662c0c0dff0ce00dcc3ca9707f5b4bad1bf1312a740cb430b674153e. 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/NLG620573617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf2d7a5c42200b3f0bcc24f6e4250a8151c03e51848b8087b7b5a45d9958451. 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/NLG620573621.
Er komen stromen van zegen - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fee5f7f36a4499decbefe5d42b2ce5beaad24166da25c034ba5c424b9f78c5. 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/NLG620573620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a23f0d136fbcdaea5514cccde518dcf5482f3c691e396c78ab94b3977bdbd9. 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/NLG620573629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4936a03faaeae147461edee054e70e72f7397eeb95bd7b71dc69c3301db3ad36. 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/NLG620573623.
Geef uw lot in handen van uw Vader - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b158f21cf13099a985db86619f9d0cef0276c5a176eff645992c2f8ebbc738. 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/NLG620573626.
Hoor 't moet des herders stemme zijn - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419badde9713155a8345bd93f75cdfeade305aabeb02778980aad12f7accea8c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/NLG620573615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5172b06c2b2c2990a65b676c4f4e935e9fcfd5e6857b7a7593e32bee0e3723f. 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/NLG620573622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7df42c6160451f862893652447831d801bc8fe5b0bbabb11f3fa8cf6918307e. 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/NLG620573616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98ae0e1dd5a2ee3604b41b85224a199906125788596a8e92c2bff897efccae0. 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/NLG620573618.
Harp Solo: Le Desir Opus 201 - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8ab3309c8916629d3c10c2050f164585b1d420f78d5c537f1a2b9cc385a23d. 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/NLG620573619.
Mijn Herder is de Here God - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca1ac4d0ea18f48136a7fc2274cae575b8e07d37d8e15b76249e4672cde8f4a. 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/NLG620573624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be527608a7b5afd09727d960cba3fba5b5fca99bccb0334c0bdaecfea09d846. 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/NLG620573625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af91f19bdfc738dbe15caf1cd5631121ea4c396ebcb435f9e968b4dd1ecc520. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/NLG620573627.
O eeuw'ge Vader sterk in macht - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51af62956fca99a4095fdcd5fdda1ea346531d0408dcbf25aef88fd53420ebb1. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NLG620573628.