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 0x83def354e75f7646c138e765254e9714513700ae0853a1429b61752fdf9d6949. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df98f623-ca3c-4755-bee0-deb4a17e5cb6.json and https://artists.proofprofile.net/proofs/artist/df98f623-ca3c-4755-bee0-deb4a17e5cb6.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 0xafb99eaa7a3558083c39a31cc2724ed89df5be2ae838115fecfbd439452374d7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFG2362112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98787af1949394845caa1715f9190f45811608b82afd87c74f6f6ef0b305ec34. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:42:06Z), 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/QZFYZ2425141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb99eaa7a3558083c39a31cc2724ed89df5be2ae838115fecfbd439452374d7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFG2362112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb747033dd88dc4d56270a5ecc0f45f66fdbd634cfedc9287dc5ec925d494b1a2. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZTAY2396167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07dff9a90c9b9c557edf84225b28f8d6261c045e6f141f1069f826c861a9c3a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZK6Q2379419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f158a0dd387f54e4458b440d03e22b9432b59a037047f39cf07d272e23a8e3. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZDA42395562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbce296bcddca6ec46a6b067df1495ee48b75637e09f3b9cf10a3547d6f45e01. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:01:14Z), 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/QZES62441116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1340744f0dc2f6fb1c441d8f38193c7b18e0d76f6842e85caa0b98ba9d287ee. Chain 2 (Bitcoin): anchored in block 957625 (2026-07-11T23:15:09Z), 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/QZNWT2434940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f152ad248f09149abd04bae40b4151858782f219d69a7dd97db45e52d085fd. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:04:48Z), 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/QZNWY2472496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3bf22240ee8c6cad810630e198ed4a6909779ddd45a581410a2904352c1bfc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB72494423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd150f1bbf1c279d192ecaa2ec7a76cd17d533283a90d202123a0b4616b8ef2e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:01:02Z), 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/QZTBE2420586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3bf22240ee8c6cad810630e198ed4a6909779ddd45a581410a2904352c1bfc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB72494423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06a0c3c9394467750a446a581452f6c6ed621e2d3b86d47397b480744aff38c. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZTAW2421378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f152ad248f09149abd04bae40b4151858782f219d69a7dd97db45e52d085fd. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZNWY2472496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1340744f0dc2f6fb1c441d8f38193c7b18e0d76f6842e85caa0b98ba9d287ee. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZNWT2434940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691dfceb77794c80b6dfae471a92aa369a4e3d977a5244289b7b5357ad59e2f8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6K2436265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4de65b19e9246f9b0f8e842f6cd7b25468171e7a912ca00e5aede8d0c520e11. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFW2524463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f416e757517fd46717ce8f290edb5686eaec7aada6d0273e4af9c68c5bc9921. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZWFW2527392.