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 0x53a91dc59909ef146fb17c08633d31cff85d0eb7e13f91a2912255f65589a167. 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/576fa876-ac82-4511-bc75-35a2ebc6d86b.json and https://artists.proofprofile.net/proofs/artist/576fa876-ac82-4511-bc75-35a2ebc6d86b.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 0x307a32f72454758605aa4b49f368578f9f0953009d18a5a66040fa04fc633297. 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/BEX239800502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4cecfe3fa146345fcbc375f4f8c31eea0bd019392233ce48f15b5983938f39. 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/BEX239800505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2a4d49779f451eeb5a4f3552c8e6c83818accf36c447b1e432b4cfe88cf298. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BEX239800506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2799b107c82bbfc6b6d369cc6ecde6a400569dc7e7edba5dbdce93386c0ae32a. 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/BEX239800507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa940f206e80921f2ee5c61d4af00389fa1d499b97b5dd9adbb498f32ab6e9dbc. 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/BEX239800508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07551cf4270c4ddabafe71f19b7014046807ada872f9f86b5e70a324fb9aee2. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/BEX239800510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6fe1c538de4eb701e138a01da7c1ca41c4f466e65359c09f1bb722a628b46d. 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/BEX239800512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d19c77e6f950e70e36ca493c28388f98d43a38ccdd472b066133858081b27d8. 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/BEX239800513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5c8de6f4d330d4e849dde9979f0758294fa708c8a00274aee17e809de50b6a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BEX239800514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469742bc3dd4a0a8ae83f44ee31b7fb896701e56262ac517b27e994cf1a2a4ee. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/BEV010000211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b0586c38e4b9138854941daca84a7d8b5cfedfee797867e819fd82d786218e. 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/BEV010000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bd17dba6125092a8b1e9d1cdca52c849e9d8c8d65db6df8caa14c6f4bbb00d. 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/BEV010100117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da20a7afb2dc32d3cbfea57b785fc9cd2dcb10696870b1dfd127992edc9bc98. 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/BEV010100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a39ff812a515750c5f078f37d9addedfbd9c0cdac35e105438e30515801e8a8. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/BEW450400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752ef1e8a42ad6fa65784c547b2bd8bea0603810eec1bcc5aabd2fb700963c14. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/BEV010300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97919ed875bad3e3e8cea187092d7e513db8190bda0730f575e265257198b316. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BEW450400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048a848c508b9c0f935da2b6ffacc9d1968cc7d1d26f8174308a35624ec8a50f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BEV010300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7d410bef4338a15117490ff41de9f888592a8106c1909270f56c93bb84e6ca. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BEW450600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f51f0acff715867ff1b39fba47ff08695c3ee2b177d4152f8f259bd88a552a7. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/BEW450600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6c4e8351746288c2ba5a3e80ab8473ac7274f540fe4f527dfe41d3eb97fa7b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR6V80718736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4539037e5f600e58b20226fdbe0fe09ad2e2f7df8c2233ad517af1dea8064a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/FR6V80718743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d9d36f7762046bb89b7cdc3f20597bf62e749db1eecb7f180268747cc4938a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/NLC241900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ded333938c03257fddabfee740a22b4df0f1a44f750c6db363ba8fa443ff05. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BEW452200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cc27d3e2c97e5aefec3b7a49aae0019b84257b50d2874ab5f408d014947e52. 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/BEW452200001.
't Smidje (Buren Van De Brandweer Remix)