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 0x2703ba6d1dc7751a6033aa4cf4bbcbc45d16f07109252928a647df7f2e339825. 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/35ba8f91-6dba-4845-b9c8-638e725a378f.json and https://artists.proofprofile.net/proofs/artist/35ba8f91-6dba-4845-b9c8-638e725a378f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Codiad Yr Hedydd (The Rising of the Lark)
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 0x0ad99be77ebc425d5037209fd3caf3469ce4a81b7ae019c47f4cb266812e2a0e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CALC40900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c427e8e23bc2f72bda8317c1dbc3477c64b9de1c48882e411ff6c5017be85fa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CALC40900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93e1f8b8c13e8375d9ee0fcf29c2954ef5fd0a7f4171815e53a670911b8f81c. 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/CALC40900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bae21faf492295f9a68081099afe0d31df944b98fd7fcd73edcaa7fe8feb488. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/CALC40900004.
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 0x80d31f45f3e3595bb543538efba57e7de3cd5296420d9c9e555a2857fc090d80. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CALC40900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956a86ae000cd41f6ea81c0b2247da748c0dab7df6db5407e3d3395467076451. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CALC40900011.
Assassin's Creed Rogue (Sea Shanty Edition) [Original Game Soundtrack]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371163aa8cf054de7fd1d6205a0dd708c3b13532c509f1b4b607e77f72908bdf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA2BN1401471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9761ed1887e9a5e772b611e4366be0d4b76b2a11c611ba2fba6c81f87f0eb5a9. 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/CA2BN1401453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cfc188ab29cb049a59ce365a84216b786dc6c5d25d39fd750cb0794b993a76. 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/CA2BN1401454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ac6ec7b199e83c434d68e16251c5ebf94e55185214269035974a2b6cd0e819. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA2BN1401448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753d3925f5e55c434cbb46e821961bf5f97df31a36cedc54d6700cb6db8cd504. 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/CA2BN1401450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cbc054501392a79a02ad0b7ceeb72dd14b04fdb0e0616f7b05c63a855f3849. 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/CA2BN1401462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa1cc7bc3fa6243ff4455f6c4d7fb4b18b2931c6d2cd2403f8834f012485a65. 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/CA2BN1401449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0fdb5003e2f4aa1a6c53034d628721662b93ad0f0b476499a4d7217d8de139. 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/CA2BN1401451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99313894de56137ac19072b94ed9e7452d43173452dd3226964f5d77cc231471. 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/CA2BN1401455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b0af59b889d83ce4a102f3fe9b9d210e78f3d8c576a9bbf6c756276d36a675. 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/CA2BN1401458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f01869fb972e9a11cf0c3bb865cc26bf4dc7b5c2d32b9d2eb7e917741e24abb. 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/CA2BN1401452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f52c4c672e10577c74f854e1465218fc10cc9c533037eec7be7408e777c1ba. 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/CA2BN1401457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc243e06d34aecab6b7b25d2e5e040c3e63559f60bbbbc7155efcb3bcadc5bb18. 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/CA2BN1401459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf286a7c25e9e8466aaf0d5249f0c6a9467f65ee3ddea01da4fcf667f1d053635. 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/CA2BN1401469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957ae807b577c72b1be5ceed20fd34857bb8373c666e64ec67b56171493719eb. 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/CA2BN1401461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e071e4b0f1d7dfae3fbde94c08b5d2c11db003c283be4d9162b5bec95fe9b1f. 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/CA2BN1401465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326b8543b66c198c54b6c332fdac665a9ac9c8e1c0d251bb5a379c9c2b194d17. 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/CA2BN1401466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7977dac01f2e293f7b724028730462c6d1298bd32f1217cfb71db111c2a019f. 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/CA2BN1401468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6632817bb1833d48af380980129963a13ca56f17f8983d1b809c3f35a18c52. 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/CA2BN1401456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9573bb539726a6244a916c26d55d87ffb83b1f90bae50062f14ce2329426bbb0. 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/CA2BN1401460.