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 0x94db8f132cde75d0af8894017cbc90dd4dfc8501b49ea21c10ce3c6c8fe8a097. 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/e1286650-656a-4ffc-86ce-a64007dab18d.json and https://artists.proofprofile.net/proofs/artist/e1286650-656a-4ffc-86ce-a64007dab18d.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 0x8c288db7ce8d1e8aa1358a7e68cdf4cb1938b94ca7da29db802fbf3e6ed903f0. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:10:32Z), 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/QZNWR2221134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fb9721883c6c6f358f7ea1a2720349c4b56785171fd5db8c93be1349dfac54. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:00:30Z), 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/QZNWR2219408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaabca8a4ea9a598af202893920abf456e2b400f290cd0fda2edce2437cb4a9c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNWR2221139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a062948641bc19068c8561658eb942d242668c7f8cae09dca4872545ccccbc. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZHNB2350095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd75d3c2187602364a2ae3546b7ee6387063613e6134df7b177572b8924b3e7. 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/QZNWX2353056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35fa15cadc59d367ff13690b32a7408d3cd3044bafbfdda2f64f73af417e093. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6G2501442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf48ce86f31d3dd3eed2871a3ff51a06b1fb8eaea06704db40c8f6e1462e7494. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZK6G2501443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5171bd54b5eb3e3fb88abfdd8de5ae980da469c253c2b4dc0676450905eae2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6G2501444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4130ac054a270dc49d9c0d886272bdd2d13750ed257a555530e25ea7f9d3227f. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:26:53Z), 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/QZMEM2549266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e50f01a6f4692917a5a82bbf123e837a886970eeefb639e37d109b2e8b2dd1f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEM2549267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180ecc2173b157d4a59ec9d6c25671fdd9fb920515c43f1dabf9e57e7c908976. 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/QZK6K2591411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5171bd54b5eb3e3fb88abfdd8de5ae980da469c253c2b4dc0676450905eae2. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6G2501444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9943beb10182e5c9348bad43383f0a95c442481c2ecb66f888b59438e89e52. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEM2549268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01990840681bb09b6ead1b0fe38bca990f3285cd4f16e9386e1778bbebf1f67. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEM2549269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5c4baba2261063b85c4136ca0833efd756ed7ca53ed440ecb1addae3b9be86. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6G2501445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8ca9bb98bb8b5b5cc3f92ebdd6f3984ada33cc5846c1100f4b0518d5299e1f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMEM2549270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf48ce86f31d3dd3eed2871a3ff51a06b1fb8eaea06704db40c8f6e1462e7494. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:41:54Z), 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/QZK6G2501443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614def9c9299cc395490dd124ea83bbd9d1132ebdf0e1df770f9964f7aeece03. 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/QZFZ42558112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7e65bcd3772f6fc2a183559e3b8354e889830c8c43526cf4e20e1bdd0ec779. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZK6K2591412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2572fc4bb79c8993e7175ba0605f9ed40854641a0f4736637ad37342d2f02ad0. 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/QZK6G2501446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b74eb53250652d47e73002de11be5430365d241899332cd72b391c05a26bb21. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:06:18Z), 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/QZK6K2591409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff09a1694c488ae686fb0bc4c0dbacaa9b790b040bba53d238c76bef71efab6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6K2591413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d4710ad9f2bd20b1ac3d4cd7afdf9053c20befbaec41baf781153dfc4ab177. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEM2549271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387baf47dd781c0b36c8d0cc15d2deb593bd808b397c45dc30600d20a392ccd1. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZWFX2520578.