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 0xe91874985fdbbb7da43228dd10772a81cfbbfe318b66c6b162564aee7b0db32d. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e63a7ab4-d12f-451d-b2df-699416f3bdbe.json and https://artists.proofprofile.net/proofs/artist/e63a7ab4-d12f-451d-b2df-699416f3bdbe.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 0xbd1fafee618fa0ccf2e4fea144bdb2788ca3b5cd7ff99b4eedf400cfe821e95e. 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/MYSL10010113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d7837a9b8e84192e8cc9886d4b7a546420887e9621b3ddfeabfcfdf899db34. 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/MYSL11001877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332560020fb408451a68929ab45b698ad3871c1c34c7d240ba79292e9f17853b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/MYSL10010088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d3b7c29ebc5408f7bed205fa76afeafc1b23a6db3abf35c1c4680b629c5d56. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/MYSL10010090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301653d6fdd3225ab282e02f0dc097a3b36d1c55e5a369dd94741873858ae91f. 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/MYSL10010098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7a86979b2a21972d4f6a6fd944d85e132bee8668a1005ce31f34447c0271cb. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/MYSL11002021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1943bf0b9f98efbed7f6f714ad7bf8291856065a673f51f83b5080b4ef7d76e. 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/MYSL11002022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bd0f9dad5ffbc3bb228b1fab3cff6f35407ce769f5caa26652c2ffb474171b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/MYSL11002024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd754e8076d5dae6f5a19f7d623b064478d38fd5babf76391718d37c45d569f56. 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/MYSL11002027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5f49545091d0273933349aef4aef001aaaa7c1fb5b70b36f2a9a877b4fbdc3. 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/MYSL11002028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d43f64b77c49b5fc7a95da64707d685d4820620946c737820f5801289e8d14f. 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/MYSL11002034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36595099f50574d42aae60177c4d0ae4e3df1e5efea9d6837f84924a3ec09c8e. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/MYSL11002036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16c20ed516b3817ad4cbaa2f81a6defe85b096e57ba175dcbf9c86fa9064dd3. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DGA0P2446821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a0a4e23dc3b6e939010950e255ac3e1be97775f17b5e1ccdd6c8eca7a5b0be. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DGA0P2446822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1969893dd8037b0d7e2c90742ab326a3e9fd1b96edc2372b4fa6374d32bbe479. 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/MYSL11100513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e729ddd36403a96c88e868706555921fd6bd47cc9b3066fb52f2faea02c19c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/MYSL11100519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeff79a32babc5e64e4a1fdb1672745fd0a9d1075524c326be5f9173ec317a6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/MYSL11001796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b8bc16517dd0359a6c4d2d8edf77998f4edde9af3745374619ff2614cfce96. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/MYSL11001797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ff862f0021e3ec9493da3d829a48cf40eb5c64fd171d94a6a624a80e7a1306. 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/MYSL11001799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3304f0f87eb93b6ef1d40fe1f68cd36e653913af7fd233a2738079ff38bd5b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/MYSL11001803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f2eb6d5ab884dddb31601d0915261776f4237249d21c82a988fc86f6bf57da. 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/MYSB31910001.