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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7134f86659880cdb492a6fe97578e7cffbe3fcde55f98a50fcf4049427dbecdf. 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/55fad4c0-0018-4f57-bad7-e0df41421e64.json and https://artists.proofprofile.net/proofs/artist/55fad4c0-0018-4f57-bad7-e0df41421e64.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe474a267404605a712d44ce10802a702e33d61c371403f52c2b506215db74faa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6N2232464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5973663fe0d96460cdc0ef1693275bcc9ea61488acdc0d48dbe44e0d610b71d. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZK6N2233213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864ddd35b201a559c368cdfa25a9432b11351a2a26a3d28e7bea99d23e8f0748. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB72359562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780a0293e8ecc8238277abbb2162b544ed1be7ab97848aa9df619f8b78aef06b. 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/QZTB72359564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8facb5ac282cd3206379439933484dff71cad67add8d7254b489610a06662b03. 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/QZTB72359565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b053a90c6df50d665694184ee4281ffcfec50e7b2750173822e75b8111f4897. 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/QZTB72359566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec81809233baf00f9b7ab45f861f463316068713fd4bca25fb8bdf6d40577e6. 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/QZTB72359567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe816d8d71de5de667369ca3bad505e0b33ac2a1350fb0881c1341228b2e0a934. 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/QZTB72359570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2b346943a5ae2b668c55a85855fd1e6216fe84861b7a419b7f2acbe8b2d1d7. 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/QZTB72359573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8afb23e46e4a22af89b320ae1d4727071ae947a9e6c2ed62ecb25f85d3ef7eb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB72359574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e4984b4683a1ace60d91d07efde375fd8e0cdfd76c726102f23d8115491ee5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB72359577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ebb13df936b583645b88027e4d46fdf5b296a09850d85a98968666a259517d. 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/QZTB72359578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b820c3e164710cd654ea1aaa09b44efb7b01af71206373d1e79ebc864d299d. 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/QZTB72359579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f2d6febf69d9587b5cbc100bd8c04f016a3eceeaf3654527b2db22c2491e25. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/QZTB72359580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95de4a316939f137c3a95e941d8c1586b97d9edce33f5e2de2c748b478980ce. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:18:00Z), 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/QZTB72359568.
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 0x45fb9920081c6644333ac67d76e7cb9ef2e43b85cf881a3945e180d6305d66d4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:45:33Z), 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/QZTB72359572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f376fa4d43cd31ee20d3f478f25ccdbed0157aef21427b1a47397fa52c3bfe8. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZTB72359561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9a1e359ce7360a9dc7e4df2c828043a7b39df9d52114e4effbfd4481e7e1f1. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZTB72359563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b94c5300c74d27eb9b8e35778cffa0cdf4e5fbdfe80d4721e6f32d438a11de. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZTAY2346529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d1a83fed3afb224e30e253432f1ac93073b7a70319a0940dd6ed6f88162bf2. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZTB72359569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac19e05cc6be1690d6b514f4d1c3cb6fdb2d244f43c43b766af5038fcb8f143. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZTB72359571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325bd90daaf924d19d928d8dffc0b1836c5f3d257060454ddc55f64e4cd73b91. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZTB72359575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735e638e3bcb11eb8eefb858c62e1a73befb3590fe8b61f632247c302d8b383e. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZTB72359576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07bfb67d7b515649e5b60fdbe90cc0db039ff6ee608a8c28a94f442f53943a0. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZTB72359581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb93067d9230d6e71743a067088570f217472bd698a2f0d1575e02eb1473c04. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZWFR2313547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d37f4b1c5ae4561f5e63ed5b3430df3e7bfbc9cedf4b7d47dd58fb9a72a2bf. 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/QZZ7V2426016.