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 0x8b59e928462f891616c130115cb5a8a07f2bb13c5d04e5800425746951fe15c0. 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/105adca1-9c78-4b96-ab98-ddf551072431.json and https://artists.proofprofile.net/proofs/artist/105adca1-9c78-4b96-ab98-ddf551072431.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 0x375c08bfc3f9344ffcc9576471f1bb3e789ba59b44c82323e758e6b9506198f3. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/NLA249800283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330187635c067864d5d67be488faa880c7adf992e4f07d25c8a51bd01f1e4739. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/NLA249600247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c68a9fbe1cadb1f5e6023386426d196dc9812db2fc58c3afaa1c11db1bf5ed. 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/NLA249600249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e73a1fe6fbf5433910cd2913d312b9da74829f05e38c7aa7914d8b665a87df2. 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/NLA249600252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3bc3a0597fcec6606002f7c4e187337e790ab4062f53f86d84e67ee0458210. 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/NLA249600253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f678ff6c3e447d7f3b44adc0b187fad469c056fc88a75b4bec54897a46f6c9. 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/NLA249600258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7354ed954b867d0d7e3ae27d6c53fdc3ce9f300aed3f88b516e697f2e88de522. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/NLA249600260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04482533f99ab649d2dd236021efe1d32f26d6cc1fa673e73f801ec25695aac1. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/NLA249800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5d2a1ab8637cd1b413979124463ff5587971f7c7a31a0ad5027120d7594270. 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/NLA249800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac03e954f1241629fb700e9bc25a7d8a2a2f8cf0d041a65d6184f4ccc1d10648. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/NLA249800038.
Eltse Grins Foarby (Live In De Lemmer Arena)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1c18ab25ea4b24e8f5e16f54d64a88aebd9fb7e128268ad40d39ef17677e87. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/NLA249900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e0279f30644faf8ef2deab446823865d7e0edd361e6c7c0a4f7c5ae9d97fc2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLA249900126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f062af916101b4627e03d79ec0bb3cb8cdd9ddd18c409e859b5bf671ce5ad5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NL2HZ2400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b43435b4955ebd0e039c3c20199457e6eb477902d8b386a827a391232a930ea. 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/NLA249600248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6c39d40e4e1512bf1905969afef1e9bf81687c0acaf45b8ff266916369ba5b. 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/NLNF91000001.
It beste ut de Fryske top 100 fan Omrop Fryslan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134b9e6f9e3deda92f774d2bfd06c13516b9caf65710ac758e212467702509e1. 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/NLW2R1716719.
It beste ut de Fryske top 100 fan Omrop Fryslan 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e27ec785a9ce5b5a1b4b7b839b800a3db30364e427e879dbf0396ae852373d. 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/NLW2R1716764.