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 0x4b19e9c6046629c181bf2997b8d31bcf1f2078d22ede0479462cf31388f7afdd. 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/4facc03f-331c-4e82-ba6d-a6c48f02385a.json and https://artists.proofprofile.net/proofs/artist/4facc03f-331c-4e82-ba6d-a6c48f02385a.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 0x9f3448d0cc8611714181610348db975e02ace8d57aff76507bee3cdf9a1e8e10. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/US7VG2569845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63803ecb19b0df7fbe3ccd5af30ccded7e4052f83f9510e961d1178a4d92096. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZGLS2512133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce03bb0bcd5c9119477b222f7d7aeb0368f63c48c00063dd97ca41c0a3bccab. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:21:55Z), 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/QZK6G2544115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8d3d235d4bbe8ca5fd1bbcb0b715833a0dc18ad86f4e0298e119fda9442f20. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6G2548539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce9ce171a3a7e025f5d1c2d6ce5dc38c63d464b768ab43c1e5afab68ba187fd. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZK6G2511986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5b763a69bc7c4aa5122fef80dcf656b50ef5347892f64f9136963c7ea8b36d. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6G2514235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0873021f174188faaa27110fcd7f7b92566d688ec9b965d417006e1a155763a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZK6G2550691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2ebcf0c769fbc8a8479403b6cd02bbdb2d8d80dcff4de830b814dcbe34b412. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZK6G2526045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cf2792a9a8798ad0c3c960fdc6a8e23f04b2806987aea4a3da70af564cdf03. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:53:50Z), 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/QZK6G2567116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea9e51c4075531623f47bfe1f0175f1c734907b4320b66fce34761ef9f426d7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEM2526675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a379f94127014d8b4984030bceb9fbfa2afc043473952b9708951089b74add8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZK6G2565647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f3ddc81d705658a0006dc23a927199a195fae4f61e9e0334102cc8e96c196d. 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/QZMEM2524074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3884ec3e96dbe4538106f41a33108c32ceff7f40254a84a05c4d75d335c5e6. 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/QZTVM2535103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e364f577b364b49e4bc74a92cf460423519b25ffc675b3c0a6ef09ac09697d9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTVM2534396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99e4ef540ecb0cdd566a5c5ce9cde28fabc7e3a2d6b62f6d5c15baf9a39db3a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:30:59Z), 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/QZTVM2539723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4681de2d3a7540a1b248dca4727facb02b887e6b809966fb27978f6d2c2a7ba. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:06:03Z), 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/QZTVM2588696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f48133b6dca4f5947f0674b0c5adf3d5c87e67adfb6dda36f8883b4a7d8c0d8. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:38:28Z), 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/QZW9K2505354.