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 0xed967f9d87373cad8c21e1395f371179abc16da525fac11c4d6dfee3229837a8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cc50895-0688-4890-ae2b-f63dfc5b3f29.json and https://artists.proofprofile.net/proofs/artist/6cc50895-0688-4890-ae2b-f63dfc5b3f29.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 0x2edc301f92fa980c48cb015ef21ed2f9627f28e83309341580f0aa2a84c7695b. 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/QZTAX2474064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d7fc35c261aea0e9ff103b31a3c7186f0171b2f7303954d20b4d41dda19067. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZPLS2463184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922c78c5dad0caad27978f4c69153905047ab1781823dbb2e253cc136382e35b. 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/QZPLS2461442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b1eb5496580d5d2e1df2e3068453e4f0727033e6a972aae91bb7d5f45431b5. 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/QZNWR2405783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cddcecc3c7cb213d3e04df79b5e661bd138f8119095bdecb3543795700b11b2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWR2420050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33cc883ffd71f1f59e25d2e63b769a91c97a7b65cc7b0af7ca6e30cc76b1894. 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/QZMEQ2419849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc236cf0055c21897c55830db6a547f08ff60efc4241436647d85ade8ed242f8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMEQ2417577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daf524edf59decbddf5cfd9b1a38497bc6950c2c4dd52b07b1542dbb3596382. 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/QZHN92454185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5210a62e11111880aaab69e40e80a41e70fdc7a817b3678d163d59129e5448cd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ22469020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7453e003ee6c0ac8312215b653efef4890a65f94c33f304ba30380e580a7456. 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/QZTBF2305114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1851d26bfe55af7c3e3cc8e0324858c2a2585cc4e0296705a230379e007dbd. 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/QZTBF2305109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dd31d7f0507194dc8ed95655521f04e9c6739fbd07c6a57c376824f408aeea. 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/QZTBF2305108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc263ab24411147248a8d6ee98b6c7b4e00b4359b375d494051bc89f547ed7bc0. 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/QZTBF2301155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853b7a89f87a67114cd05dbecfee0890bf2fd87a31933cab3ed2776a0a691aa4. 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/QZTB52364641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d61c338b8abe3761d236684dcba1ccaaab80f2d338e42f43a85bfeb8367883f. 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/QZNWQ2321263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f387c19bd994122781fbc493012e756c7b98961f8480aeb900aab343e33dade. 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/QZNWQ2323248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef47de3110653cbb770e41b04bfbd608718df314489c96ca71b8c741002363c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6H2382765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3296cfd40e26b475661c36313b6c0cd492c8658ae13536ac2491c1f3501cffa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTAU2225362.