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 0xc47afbb51474853ffd5995e17482e60c0cf2c58bc082659a31ba4111fdb0d55d. 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/f6a05af1-9e52-4ab4-a8cf-4a312c577ffa.json and https://artists.proofprofile.net/proofs/artist/f6a05af1-9e52-4ab4-a8cf-4a312c577ffa.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 0x194e933da38cbd1f2354b4a84f5f372807cc603a7bf8311d7f531c8e71219362. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:35:05Z), 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/US83Z1459392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5959fd0f62f4ecd21a79b8269d6a4fe4db406043b88455daf6d9e11339f26582. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLF711506196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1715b465554efada700830fe01b1c7c6886173a995e5c373b910b30e5f027b1b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NLF711603371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8922f25058b3a195ff35fc4d0b5be4d1a4b66e162b0b96bb8304fa6cc1290b90. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/US83Z1655746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9794c98014ab96c4fb301828d8eb594f7241125e3d2e8dba835d15f25c657e26. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:51:28Z), 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/US83Z1796172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f4df0d72a0c1a4b42315b04475daa817400c06835fe3567988bb25338c4b35. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/US83Z2008990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd9ed08d7b45b44d8b7bc682d9ccacf15f1d1fcaed9bb5006fd46a6dd7e0d14. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CA6D22100199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8600a35057899c4d35921a74d20acb6d2b4463b7899e0f37d9f53424e01250d4. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/CA6D22200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddaf9fd74de5a1accbb617f75b55f108189b246cfe7f2459623c37bbd24f42d. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/CA6D22200270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0f09e0c95c1b88d404d0db71f261e7019765f7f7593d06a11cbb5decd5d496. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/CA6D22200437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7773edab656014a350d737dcdacb302d8bb03d08b337fcd8da75412c116c091. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:51:30Z), 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/NLD682401246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2f5c6cddf1e655e4f9f98e7ab4c3d02532179a25cde5a95886634921ff194a. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:08:34Z), 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/NLD682401627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c2ea08ce08efd6ae10d3e16821e95df7801beed7a014f8243fa8e72ad411b5. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:10:52Z), 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/NLD682401628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc78ad1de0214fa154498a0c227c38c10cb82a62115b27fc07c7d2292f68eab4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLD682401629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed512a52bf3ded0aaca3a3483e73abd79b8fea594863736341b0113104337131. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLD682401630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6831e678a719a690dfbb1397d2e2114748bbb131f428540a365c419011f6d8. 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/NLD682401631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee087b9cd80de110aa814473caec278483acb76a52281314e937f34657a0169. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:32:43Z), 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/NLD682401636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6938d3aa5a07f7aac405f17933bc7b4eb5f536e67ef600681c8c7c57b677b052. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NLD682401638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c71c906a3413b2b5bb1e87fcbbf42b068dc4c917dbbbaecf1c9b36e1e381266. 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/NLD682401639.
Don't Give It Up / Surrounded by Impatience
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7aa67c95dde0beff59c042b26e66b163a6446cf7dd1415ceb72d8bb132c380. 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/NLF711705111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb4bbaed2c9dd9a0f30acd812f553f510dc0f39adad17b481d5f1b83552db1f. 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/NLF711705109.
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 0x1e6608ee580f78868384affdac5edb510a38da6a60755869c588f15686f8be53. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CA6D22000392.