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 0x57c11eca77e7ba58580649435c67b4c6e8766d3cc05f1a1b301027685a9c4405. 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/032665be-65d4-4c98-bddd-18a84f6381c8.json and https://artists.proofprofile.net/proofs/artist/032665be-65d4-4c98-bddd-18a84f6381c8.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 0xefeadba60b10a1ce772605831e0816411a93cde1fdd0b489953b7c87eab9f889. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USL4Q1820376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6ac862eb872edfae88eb2fd4829c9135ed2fb3e286c0bac9cceebbcc6380d1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM9AA1886658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f982fe0cb1f6b93cc1eb376b879989edf25bf363e6632ba83042179f474d4f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM9A91624310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896c3e6b293b2152d126f44ed5c44a38a0c387e1a66baa99701e094f54a11479. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM9A91624311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5ebff8b3ece04843fb4377f184738b3b0e9bde201097ed141fa2808298ba39. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM9A91624312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f113b58e998953f498c58d4ac76a109ef1cc0a193500aaf0e0b6afcff0341be. 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/QM9A91624313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37a07349551407f58c91fdf0abcbf0be0f30b6a6f4c78bcd4c4acfc099fae67. 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/QM9A91624314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93caf11d689167aca72adc36025d4fbfa47696afa5eeb9e4373a0a3fdace78d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM9A91624315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fe50d27c5716bf04fd8e5b0285320302fbacbd3f2fb91419f537560c155997. 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/QM9A91624318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc341a4b5c315ba3d8120baca1cde89cc5daad5fda918eb2f53d34d9ed5830b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM9A91624322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d815bef05eeb8c595f0ce23174a448ad6ad4629a9d74bc919df3092a9fd899. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USX9P1444880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012686b755e29efcab3144883c564301dde78a9ad15823fd10b210c4abd6a442. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USX9P1444881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca96bafd4f73dde026c3be898331733edeb78c4acdab0fcb591ead25707d0c4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USX9P1444886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f1662da555074869bc993991bdc3ee0d4e8cfdf1b8307aac4d7d51b2e31118. 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/QMEZE1990345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeae365a34bfc7e814e977151cd1ec98db1db2e02238e2afbe3d8e1e65909c7b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH1610751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f6f00a64e5b748391149d13cd5bfe14452c0bdc3714e62b60fdb8c1c701193. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUG12302960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747740107c10ba9458c63d0a3f47402157aeede6104b4fe4438d73c1e8eeb730. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUG12302957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f09733faeecf3b6ce38b6a586e6145c6d5fd3ced16f46f69b74b47e49946bc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUG12204252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6cad5143dae844ecee8f21bfeea44a83a94ba9637c4e4dc9b56c992f26711c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUG12305234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad234a219f26d6a671fc5c3717c30a5f28e45da08b62abba80d5dfef657de24. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUG12302964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c1d61e0c8cd0cfd7422f817d2edc1109d3f0e92ed008e19d50378549164f45. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUG12302962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09fc224f52fa7ed5a9201cb8472571f03933e8994fa14d6ae4b696101a7a987. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUG12302966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037b87e03c3ec4667f38dcf304bffe8698eda3ea5e83f574ef7a6ff3090f023d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUG12302968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ef75a71c94f014e6ba7cf6d69ac36355bee74e5864df2ed4255a5e079404f0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUG12207900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87563173800576ccec49f9f7213b18bc773eda769ddf00b38ae731a515e479ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUG12205273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6947c0f900b8f9d8ab166393ae8bca7697fb87b80e18fccee1f926a03005ee9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUG12302972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748d18791d0ee5bf5fa615bd85b12b0dfb23efaa77d4070a80581964cdd38659. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUG12301123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240e1beec4f5471b900a93c33cd75a0750ebaab4daa1b25a5264d957e134f02a. 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/USUG12302974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8095dcde8fad6049ec2248c096967e52be413bceb62a3aca9229db28c51d8892. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNMU2420616.