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 0x616f0ebceb4b838313738b5494e5f57d3e9fde89ee6ca8036c047dfc4e00dc9d. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fba9e166-a53d-4020-8174-6932915b4b7d.json and https://artists.proofprofile.net/proofs/artist/fba9e166-a53d-4020-8174-6932915b4b7d.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 0x5256782e433dc9f886492ce4a9e9feaebeb27cbcece65ca04ab556752f6992ee. 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/DKBV79601201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69994673b6ba30e94c2728013f9da47586982d5dbbeeadced05306122f79a5e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DKBV79601202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d543961d8392d418cc699e7a7ee5e0db908b4d770f302dc9be69d710e425af. 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/DKBV79601203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07d3012916df2f07fcb2f9d4c501c2e8e94c895f418fb290189267c07d76e52. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DKBV79601204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593d743fb2792263e4b132e660cfdf4fc217c6296d686399d3aa3720e73d11e9. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DKBV79601205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4adcb0ef6cdf84e8b78967e94ff83cf5010f77e1753e876375e6ee2f58ac0c. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/DKBV78800901.
Den Gamle Mand Og Hans Hund (Enter My Heart)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fb108f30f57d4a9d806069aa99b453a4db7f838ba79bb3b0d1a86ef2281584. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DKBV78800801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706526f01415d68e43a9a31a94b032528b8d3742b9d556acc8b00b243e62e975. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DKBV78800906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab2e7668c3ab420f8f06d94ed5280cba5a52133ab9dfc4b65daabe7dab05958. 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/DKBV78800902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf45ac02fa260fa6b190fa243945e190b47eb0f4460544a0303ea784ecde69a. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DKBV78800905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26975300c5dfde48185d1bb517355de3aa1afab5e0d1656016b298a3506312b5. 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/DKASB9101302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dab214224b22bb35fff68d763e4a4e2ba8880e6848b3b45c82ddc7c569f2d5. 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/DKBV78800904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecb2363d8e58b2940394ccb012570c649d5d1f5bfc8439b5dfcff365e79a252. 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/DKASB9101303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9040658a25bbf1126518a67e3933d2caef2025954afe8301f32f13893df28ed. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DKASB9101301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53625a71599a200cede89dde1280a70eeae3e44e54501a0f1e88c9e645dd199. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DKBV78800802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03800976805fc8236dc5fa143bea7a6f55eca613055300ae4f05f958b6e17dc. 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/DKBV79301102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03800976805fc8236dc5fa143bea7a6f55eca613055300ae4f05f958b6e17dc. 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/DKBV79301102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe901dd5cf1369bd1b101b16a867f97c243ebd9b7a0fa61627aedc616ba800634. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DKBV79301103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea5bd12b746037c6d2a681503c19f3378955bad3b50c8393e4c8579892a1265. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DKBV79301104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb5d41654ae6c86bfe03f8e1b6e749905618a3554ad1cb31a3955ce0ab8e414. 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/DKBV79301107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fb108f30f57d4a9d806069aa99b453a4db7f838ba79bb3b0d1a86ef2281584. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DKBV78800801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53625a71599a200cede89dde1280a70eeae3e44e54501a0f1e88c9e645dd199. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DKBV78800802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8d849847fb8b4cad910a444bb5fcdff3434a27188bca01b536c3cdab556a4d. 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/DKBV78800803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b08fb9630361f0903f04afab42caab3e7ea32df61ed1e5ce745c3a39901ecf. 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/DKBV78800804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655ddbd5e5b7332f971cbacbb323e12ff1e64ae5bfe697b758cd5f4cbfd24f2b. 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/DKBV78800805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe119b1b39e5b533c6a83280fba56b0f36935628c5ea1a2b3999fe117853f2909. 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/DKBV78800806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a86284e865c47bd09605c7f9133760c6a3aeb0a6858ae77b3dcbb6cd657a7e2. 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/DKBV78800807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7426645b3d34dd15e8953a69d3cbfc39a42efdda598bb6f3b1fb0da9fcc45fbe. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DKBV78800808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc65ee6e0a235a471cfdff692f49deee4a574df31eaf958935f52b164d74a4c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DKBV78800809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9d99462dd4bf52de75f47e0b7b79ffc9c56d998f7f6774087c8677ae5bd949. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DKBV78800810.