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 0x079a320086c91f0edb66e778badcf01ad7078cf98438abc2a6da0d66f6e67dab. 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/af95e7f2-56d3-4989-a7d7-430cc22f3ae8.json and https://artists.proofprofile.net/proofs/artist/af95e7f2-56d3-4989-a7d7-430cc22f3ae8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sven Hammond Big Band Plays Ray Charles (Live at North Sea Jazz Festival)
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 0x7a590761a509969985629f60d331115efc568586b2a128a068a62904299acd1d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLRD51400559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c179e9838b7a285c3e1f69a11f87c50e051ba13def68a240ab4f4aff22f442. 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/NLAG62001003.
Diamond Drink - Live From Paard, Den Haag/2016
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a89652ae63a5b77c61639d864526f566a9eeb9234706bf4c9cdbad537ca1bc. 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/NLAG61601005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642d0f987eac8c571baf5e8f4a464ca4ea0621647332c566b66e7934e85f375d. 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/NLAG61501006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459b105ef66b911b6cdeb1871ab4bc50e546891cee1f18ac38d53eb40e862f3e. 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/NLAG61301025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84362e274236546956a2eae7f72eeca15a53fedf5ce5dfb9008fe1955943fc9c. 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/NLAG61301003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cf8e1d9047b1b2b75334a8ee17c2603eb5fe39ea7c5c6d6d6eef150857b89c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLAG61301011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6d03ebc0f36d0d15bd659eb148b4b8c339f36cdbbf9b718646bf54388caede. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLAG61101003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50592dd13af05d0938274197053dd92c01666f65ca8f2bf4f84325eb15843b4e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLAG61001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05a82b26ad3e90bc001bcff0b97c0df6c3a0231209fbf7d9fcb81fcf0379d75. 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/NLAG61001002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dee1da4e130baac80dd20367eb37391cd375696a35e38a9953d22477fcc040f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLAG61001003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0965c076590e2c8aaad26264eb3e3fc4c7407931186f951212d0a56e5bc67b4. 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/NLRD51400562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26e9f81e26a527c3050052c7ac2478dc5541d44f317fbcaef4913356844ed15. 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/NLAG62001016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b25094ae67eef11edd10636cdefe25e35caedbd4a07f12c4848759a48106b4. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/NLG532100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dec2b76bb6bfb09e12c88229f714405185b5a10b444bc3d6f5500d4a68a221. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLAG62001014.
Stuck In A Moment You Can't Get Out Of (Live at Giel! VARA/3FM)