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 0x51a4e7b2d3bd6bcb8f6117c085e92e87338156d0d355834861eab5d1c53cb79e. 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/9bcbbe5f-78e6-4e6a-8773-3caa8b0d6681.json and https://artists.proofprofile.net/proofs/artist/9bcbbe5f-78e6-4e6a-8773-3caa8b0d6681.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 0x1d4f4ca6653b614ba9d0a91d1ef923ed1d6e7e5afebe2f8f1ed83fbe389528cd. 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/GBUM72108929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfc0e5a721da6a93b963e34655bb3dc9a3aa3f4cff38eb06a465dd723ddf3db. 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/GBBBC2100762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c4bc9023ab8b55d512e865d34bdf159167a24d5441bbdb599e179fd4b66998. 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/DEG932104164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538ec5d905992a12b67619ef32080da57394fee8a8f1eba8d90b2dc9fb1d1fe0. 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/DEG932104173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be0dd2da3db7e535d5768de5571a5277cf0f9d6761c3a3e661045d68c4fa97d. 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/DEG932104178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75509ed5375e53959cdc79f6e05ebcb36cfdfc35d0404708b4907a91cbebedce. 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/DEG932204746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7951f573ecfbf668ecd796986ec6359d62a2bd900e2d85d1bbc0c29714b93f2a. 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/DEG932204747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd04318466acb8ac61bf555fc35915efc8f7b38a67ccd836f000b5f7e87543a9. 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/DEG932204749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85cfcf55ad2098b60516be5ad500dba874d16888470ae8c9a68142999cd7040. 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/DEG932204751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97a02d6d3b885b768ad3078891ea0172fc0633cbf1e4e7876b87c08bcf5a63a. 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/DEG932204752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0df89574c4308225e9b5035ec6413d6a73d6111c78b78a977cbd439d459216. 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/DEG932204753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277afaf7911dc4ad3c7b3450922aed09f481241da74d7b221bfbcf7bb746dd30. 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/DEG932204754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a12c26561a72581127e834408aad7c3c3ab23bd4aaa9331ac9a7e85513a710. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEG932204755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749fe1aebc737523b408cb7724515f0953f6f201a70ba09bea49964fedfa3eec. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/DEG932204756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67581f4120aa25bdb503135379c3a53912b8ce90cc10d0e96e0b5634ac92164. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWX2034201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080d2f647089f9399d4995c7b70a76b3b735f1d160482aee53d69df9775bae68. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEG932100479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3ce8e683c89a277d65bd9d3fe4197caca3b70a4f4bb4041191ec1e93d6ca19. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEG932100480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcab6059623ab40cfd9fb3d5a665887369e5b876c8774ef1fe82fdc89fdac105. 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/DEG932100481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1cb744f41c37366c9092dc905d5624630d8eba662146d5d8ceff126fe56575. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEG932100482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38be03ce9b950ebef2fcd16543ed82903dc2bfaa95b766d71236b2329e3e0db9. 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/DEG932100483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b45fe6095efda106d9067e15bfaa15ee2323844c654d9dfe4235148b69f4b9. 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/DEG932100484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba8d1a0fe0e356e254c543f7c3810309992b68cc4271687496ca28419dd3055. 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/DEG932100485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4331cf0feed222539ea11c5d20f203852f54ad8211ed3c4802530b9e345f7ad0. 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/DEG932100486.
Maybe That Song Was Meant for Us After All
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde889fb6fdc9a4dc01b7422f8d100c246a9b3e2e0d9c0295508b019309bb6c56. 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/DEG932100487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333c2e53e67281a5df19eb52b1ba0983dbc704f7805975f7dc47f19d83f9b779. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:40:06Z), 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/DEG932100488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2f3a0f1d7f2dbfaf8ae7200a781e828233871d730201b34923d23db36f613b. 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/DEG932200542.
Waves (Oliver Doerell & Helga Raimondi Rework)
Waves - Oliver Doerell & Helga Raimondi Rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc77b27bc003068fb352bc02a905e55cddcfc302d8ed8c034ee02c6fc415a0d8. 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/DEG932104378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309139fb5090922a4a1090aad7ba0191fd20d483c19b759f676b72a18122c881. 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/DEG932104165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cce03a9ce0666d6f5ab8b60a1a317121a11cdf5e750d727d66739b47dea3c1. 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/DEG932103512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f02b27a2bb2405f421b2bf595778d1ccd67f69de3302f4392889c7e400e742d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEG932102603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63d29652993e32bffb7459e2a22f9c856cc8fe68c4eb13ed0411c6d29dd2dd8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2200532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff5a8e45244d93f70ad171fa1e3c5fcf257cc500f3e016b651dc3d2610a8cee. 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/USA2P2200530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5edac41cdf26720dfcc2567c4758bf949efaf8ac2a3128cd481ac3082e1567. 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/USA2P2200529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6e6503c4f075b69a0775f74c7f185af8d7a8253c598d927cf53436bd2dadaf. 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/USA2P2200531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8e68137b544f26eb8ae38bbfe2f6ee6d9017a83e13693506e338548ccbf057. 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/QZ5FN2521783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d921dbe8bb08e8c1afa202fcff781904d8d1371d7c23d6a1bc920a1bae5b14. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZ5FN2521773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6c3b6661672f4128c63cf52c249f6726dcd22edf55ded92af6a6a5b718e0f9. 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/QZHNC2506132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d921dbe8bb08e8c1afa202fcff781904d8d1371d7c23d6a1bc920a1bae5b14. 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/QZ5FN2521773.