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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b67c62ab0ec5926a723990a82b2ec6e312045d284cc81dad39c66c1e5cbc027. 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/ecfa4a94-42b7-4d09-bef4-f4cf9c32364c.json and https://artists.proofprofile.net/proofs/artist/ecfa4a94-42b7-4d09-bef4-f4cf9c32364c.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3e3eae6c8fdca3400afbec337a4b27bb01f6a4489d8aa73ebae2e2c8df0a12. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USBX71000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa4bfe9a42ba72c1bdf0494fc57b60879f3e11a14b41e334ceed4bebf4eaae5. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USBX70800017.
Baby, It's Cold Outside - EP (feat. Paul Brown)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507dc8c2dbe145340ac3a5124c97c01f68162d4922a416033a550f0c540bfb14. 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/USBX71800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08c7744d391d7c3788e92d4e470f72e616d4012570bd0ccbf0164f4a265ccd1. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/USBX71800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6b1503492c7d370d18b4ccabf31233be62350e7674c8e3d5736585571ddca2. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USBX71800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b961f9e8e146142b867e8358d18e31733efe0a9a3964225684e608d6d5a48a. 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/USBX71200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced5929075f43ba60ada8c83c6c9e152bb92e827d7f817f73a32ccbfd9a568aa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USBX71200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b49ad093c835deb9789638aa713a4e4e7a02538f1ac56afbc117a006c0a7a4. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/USBX71200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7615ebaa90e2feb733f76f9fd768d001cfbc2d84c0d722af923047e7018c2eb4. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/USBX71200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1aa26d72da1527a3223083d6364b70606d61be832442ea472e8ef3d47662405. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USBX71200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b961f9e8e146142b867e8358d18e31733efe0a9a3964225684e608d6d5a48a. 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/USBX71200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b49ad093c835deb9789638aa713a4e4e7a02538f1ac56afbc117a006c0a7a4. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USBX71200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7615ebaa90e2feb733f76f9fd768d001cfbc2d84c0d722af923047e7018c2eb4. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USBX71200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1aa26d72da1527a3223083d6364b70606d61be832442ea472e8ef3d47662405. 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/USBX71200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cccb6ad48aa3541a03412fddeea739ca0b3bcd55f6b2d13a4f1b7225c5a4f84. 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/USBX72000001.
Wrap You up for Christmas (World Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb787af961b94b44c42d454a0eed7a7fba32becb140dd3e8f2758bdba482d1c. 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/USBX72400002.
Smile, It's Good for You (Bossa Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822bb0a8f0c3da1d3a3382ceec98bb0327507fb1539b243958e14628cc21df32. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USBX72500001.
Smile, It's Good for You (Bachata Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3751313f4f1c6db6d975408c13f44670608d52bec799e105afba437b0a2eae. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZPEW2585495.
Smile, It's Good for You (Tango Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8093e42167a7646d1c0adfb9131e190e57bf184235fb87243862d5a04666c619. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/USBX72500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b044b72895d2d9dcc675c44164dab26c5925f55632e13b449aab6d84d24653. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/USBX72500005.