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 0x3923af826e30725e9034cff7bd96e288ce3de61cba8887552205006632a1cb27. 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/4e2b8871-afb9-4925-bac9-1dad6ca76c49.json and https://artists.proofprofile.net/proofs/artist/4e2b8871-afb9-4925-bac9-1dad6ca76c49.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 0x22d1cefab2816f8d76dc19e860b45d29e994241b5c572a7b4b5ddc2bd64f1479. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/BRACT0500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1aa1a8dc7d7a6a2a5017a77117593f3c074b6df81cefdc43fd428649ffa3a2f. 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/BRACT0500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fe82c9746bf52574f5e51f3ec66544020aeab950dc53d375bb4401260039e8. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BRACT0500063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2461db3f45535cf101b8090b9f842a1aa7f28d2e908aabb237f5425c968c0f5c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/BRACT0500064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f948b8e19b579bbefd9531357a150827816dd7b0cc0fa86f42d8bcd8f26735d. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/BRACT0500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb958045d5935b1d033ab724e8ab6df09ae05afda8bc95ff0cf2cec1a2e09e55. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/BRACT0700379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b675515f8978911f3f80a92483da8d5934f8ee30c18ec3d774a035529492bd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BRACT0700382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21176ba64a954f3a06c05253daef4f1c0f6b7ba7c9109241f0c91e9aca2576c0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BRACT0700384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39962b869849d90bd2e21bf66c4cdb2bdb39ec9619be76d81b9ae0cd30ea228. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/BRACT0700386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6af980c6468c14b81eb482be5a28e7fe154f1d52c68bc589155a82ae7bc9348. 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/BRACT0700387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcccf2a18e3d0de1178a801f1c99cf883dcb1331046e927cc0a827767fc7f228. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:13:57Z), 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/BRACT0900412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c81b98e9fe4cb0bf0df1c01f03d4bd3ff583d0c2de01bbb9162ce4dcb24ebb. 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/BRACT0900413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3635fdd54e1ec480c83c94a9d61edceb072d29a9a9cf2463ea3a6bd9858b62fd. 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/BRACT0900414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154e573d9102f6e99d72d9577a9412f8cfc4ff80004130bd1bed3e87f8ef31b0. 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/BRACT0900415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd90832c4def0a53cdb96cd44d307fe6466121795ab4041f09e838e78cd374c. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:49:21Z), 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/BRACT0900417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecd4b4695152e8aee44d30f2069a03c34d0c376b5e590732ae4e10e82641c7b. 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/BRACT1300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9aa9a0bee548cfcc41bd5f41365dfecfc39e768cd836054f86644030b20730f. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BRACT1300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee88fb5cb02020e137edf43cbddfd9292503ba96215f88c3770c1caf40f14e9. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/BRACT1300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16eb13aca762dce84a207a4e741736b8919f52690d8d24ff97e13e08ec42386. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:35:16Z), 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/BRACT1300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5a49641ca46e730e22043f8c7884152798a27cecbd3b0a1f2bfa854f8e9768. 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/BRACT1300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb377d4b09b89aa0971012758fa4e6d0bb626c91d1b0aa73fa9e6c0c36e34a5. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:19:19Z), 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/BRACT1400290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9678bae4c63304569df9e72d15986fe50324edd83fcb37a897d7334536474c2. 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/BRACT1400291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce571edce85168778b9189270f8d6113a92e80141ca9cb5cd9f53a57e64b830. 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/BRACT1400292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5bbc4d6c869ef0875bc5144d752d81fe2718b925abb1446e528eab23f659e6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRACT0600401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c5ab09a6609c5f011e115c1f889d9c41023bf2b114a99add3939ce3e37ee5a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRACT0900886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebba93300c8db4592808543f38f5ab2e9cf4d8d4f340c34929736e5116486742. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRACT0700871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaba872e68604735b5cb0133786bb7a130ebb41cbb9b9eafa9555de09ac8787. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRACT1603639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa3b1e19f01b728c648ad846eb66159a43c4cb3638fd490055e940c4e08b5f0. 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/BRACT0500061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0f00edc78b4decb37d6c109a4cf3f453dd087f8a9d75945b5e67bda6f577f5. 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/BRUSA0300706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c62c08859be3b97e3a46c1a1d1c694b1fe04442378a10c002103b870d2f6a1. 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/BRACT0700385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93440a459311d13442b74feece7a6a127c86ee77887e65e29ae1c33bec598cdb. 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/BRACT0500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87e5d67d6f655c20d07c8b247282b1e300aa74ffb55106c9e0a00cc237f8738. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRACT0700638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00dc6e28b8b5c5d93c6fc61c7d947e12a85c27f5de51249bcf5e04c3af02503. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRACT0700647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4564682209ebdea91c1d62cb259543e988ab2a6b6e15341f921151e47c79ab. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QT5AB1901004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0caf64ceef44ce589b9168d674ebd2084b2ee40d80df5be458ca83a297e316ca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZW9K2443386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfad41b03ab92a5e3323450874e9575d54014f5de7237067213972d1a7e1ab4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRACT0500059.
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