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 0x1ed063c76dab95ff3f93831168c9088f3a696f12ea27c722bf9d47750bff7ee7. 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/a18362d5-5a66-4fee-a0f0-361c10a5d1d5.json and https://artists.proofprofile.net/proofs/artist/a18362d5-5a66-4fee-a0f0-361c10a5d1d5.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 0x2ae86a40f90357e5d7cfc07d80b17188d929573b30e3fd1a17dc3626b1f85aef. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLA349500401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180d2985f5714bd7a546f33192dfc6bc456eff36f8f523117034816c86d91765. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLA349800248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb544235031c54085788d7c8c1433bdd598fcbfe6c7f11e52fa0f81256db9b4e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:25:51Z), 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/NLA349700245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4dc3674f3c963ec8c5970f52195672a04733d124b2fdb83ce23df41a4a65e7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLA349700648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6148842a000fdf7118069da05bcfe18a8539e16eec005b6d507226495070ef. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/NLA349400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa340e9498e50622e8fe769feb4792f85b5ef45b87c926fb6165739bdc7f1d6f8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLA349500566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c30e38b0780bcd4736347305da4f6e7379a7d83f0f867e38fd0b897879e6a9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:28:31Z), 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/NLA349400498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ca7355556be4cf7800ca570b649a19c3a505490faf107f1f78be5124d3f325. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLA349700178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87731095f8a2b8f0f55a8ffef45c5685cdd4fc434c4934e44ed5a9e64b4d0094. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:24:21Z), 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/NLA340300010.
De Gouden Jaren van Telstar: Ben Steneker
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbff771abab23b016226ee4d42bdddb9603bf52caa0f28bc669fd5095ff06a2. 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/NLA340601105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd24bd935057bc6708bba54b16ea4d7729cd2fbec103e49936d611e7b33ae36. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/NLB039700005.
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