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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 0xe6d516331aae2b0171d523c16015b5747941d8495906bef8ca963451f458c928. 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/9c1ab8ac-0766-48bb-ae1a-1ae8181a68fa.json and https://artists.proofprofile.net/proofs/artist/9c1ab8ac-0766-48bb-ae1a-1ae8181a68fa.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 0xe08162c6fb0ed8593a88a1f1bfb6253f54ae34f651d84360784d8f359b1db03f. 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/SEYOK2213140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd8e4c55587b09928915c336cfee69c91762f5c71d677fc2aa2c5d4ecd639fd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZDA42417083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc624e0a1a607787ca27dcc51cf88ad28946346f0ea7203cfd7e27679c6fba90c. 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/QZDA42417085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32aa640525d99a7afef2717cc1dabe043334812a7fb9fdcd6a64858d1835c45. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZDA42417086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e30cdc3fb1d409caa8344275013f4dc77a98e084a993959313f66a71e61033. 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/QZDA42417087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592bed36a4fb7f844115227de125d1339f6c42415a3d0c1d160b1c75b114abef. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA42417088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d135ce34a2cb9901684b7c9aaa2dc30d17595cea2e413e35fa346b297cf9bc. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA42417089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032f3169a017ab9375ebdbbdc0b42af0dd0179fec03003f1981365bbb7691296. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:47:12Z), 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/QZK6K2449143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd042ef37c842812621658b302a5c87f9b71fe3179d21e85d891ddbdcc78c9c9d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZK6K2449144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9236e03c11ffdcf38b7b0720e0ad36646bf34e86074c4b5d5e3a44d56b5e27d2. 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/USL4R2479903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd8e4c55587b09928915c336cfee69c91762f5c71d677fc2aa2c5d4ecd639fd. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZDA42417083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf273152bac6e5109326535f017ed8e023e347a8213e90c09c04df0831fea4b. 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/QZZ7N2405668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8af9f3f2c1cc27794572947e595a6f11135779a85f1362f27dc7d15d38c081. 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/SEYOK2215823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d709ed7cd459c855aaa5c1487a5b4832952c547a897362c28a7d2a54fad32f. 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/SEYOK2215824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f670535dd5fb088c9b7a06f7435c69703b5ffdc904b5cf3c19aed1886e8527. 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/SEYOK2215825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6c37b2e08a28592fedfbcba6c45d10875ece4e9c9f4db38aa3bdf1c4d1b3c9. 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/SEYOK2215826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5067a3334d73a83d689071db24a6626fed495bc23900ae53ce2811e6f72878d4. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZRP52256794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaab258ae0943adea46f092577816f6c97e30661a2e6fd0cbbcb55ec0d1ed5ec. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZRP52256795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9f614137d36704ce0c9f263b57d1f8c2ff6f227df0f2c432c9ac495a9b8eaf. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMEN2397258.