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 0xf40fa7c008b6d825ac2f1dd7fb77b3585dc3ebb4a1e0e8ce11cea643e067d8ee. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91ed553a-8b48-45ed-8429-470b6fa98d4c.json and https://artists.proofprofile.net/proofs/artist/91ed553a-8b48-45ed-8429-470b6fa98d4c.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 0x56976546b8a9c146d4c54bdec767964fb9ec885b5a54e87d5a2bb42bcf3720d9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLG170300006.
Stepping To The Beat - Dave Mc Donald Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c518b6dbc9544953cadd270a9285e83b5e7f28a2bd88b92c91bf5faa9b3d6cc. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/NLG170400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ade089299b0e875632c960590719e95cef836aa93f63a6f0f8d30eace38aafc. 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/NLG170700060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab3097c9981ff0df4529907d368c55139aed85863474cda163fbda9c948081d. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/NLG170700061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ade089299b0e875632c960590719e95cef836aa93f63a6f0f8d30eace38aafc. 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/NLG170700060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4e867c44f8c5e8f8c7e1079ff2a13715ddb4def350a048a4bdbfbacef1cef3. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/NLAT71500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675a557dde9cbcfc47eb8e6448fd232e0ef498514e9ca942c7168724d43df956. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/NLAT71500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d441a14e839f17d98f0b17de47c9b95d49cbdee7d479931a27d05d04c394c2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NLAT71900001.
Hesitate (Lucas Deyong & Jackob Roenald Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d95e25beac36383062404cdeb982b5f701f8c1ba3152a4e55630c1d9a362ada. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL2H82400016.
House Of Justice 2008 - Johnny Crockett Radio Mix
Feestknallers Top 50 (Grootste Party & Feesthits Aller Tijden)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219719d18e06548be4a9fc8dd1f2efa231defad60da4eb499e6d8b71a0fcbef0. 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/NL2H82400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8845d887519907bae242f81f774e7389322babedb20540b25c96dc4cd27a5455. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLF711302711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53d75bf2fa2d65c58783a2cbd603f366dcb39c820796d6af5fb1528a9d4922c. 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/NL2H82400022.
The Ultimate Dance Hits Collection - 100 Of The Best Dance Hits Ever
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a491e56b67385600e8cf6010bc522e6acb0243514cb37a89607f7798494fbb7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL2H82400026.