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 0x520448bf9cddaa962de702d4aa81c842f926e87723494fc550dd2a6c6a860bb2. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/571a887e-5ff5-40d6-91e0-672ea84952dd.json and https://artists.proofprofile.net/proofs/artist/571a887e-5ff5-40d6-91e0-672ea84952dd.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 0x71e31fbf328dc4a80ca0f162525487ae12801f78c0b21a37485c4d05231b5746. 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/DEUM71103798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952e9bad64732aa0760b67e220d136c92f1064f55a8d7c90032ac9e51a0de3d7. 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/DEUM71103799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbda25a455c778a9f59036a7affa9c888280a7641c2796d1a23089dc4462797a. 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/DEUM71103800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881e637b4f02abbe9a13c4e628f55b277b25863f368bfbabe4ba87bc75f26d0f. 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/DEUM71103801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c18e8723df2e8d1eef8e83107e1fcd30d86667a3358147e30fe1c6f8011f708. 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/DEUM71103802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa1afe9dea460094dc797c32bafbdfdd3f4aaa4011942a9b3531a36ff17886a. 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/DEUM71103803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfbf4f80a89a0235f97230c5d875b60e35b004a7a0e98e08238c7c5fc7aa7b5. 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/DEUM71103805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3921205d8b53087c7b7d9b2a018385599ffb8d2d1d2dba622bab522e3e80717. 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/DEUM71103806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10423f97f364ff496cfe055eb3c02dacaf76a9b9a517838c1221d527f28da2f0. 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/DEUM71103495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb945fbd95ff3d3dc92a609afa3e0abebe7016fbe4d7ed9115f01691377acbc1. 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/DEUM71103807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1774cb8edd07d297dda6c3656ace9ede791f0cefe16aa894d742208af0a2337. 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/DEUM71103808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7889b77ed7f088da606b1d64e43b902601d81f73c4fae46be0b522025c474339. 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/DEUM71103809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c56a34581b3623b38e9ad5058915237ddccdf87ddf803e5d94fcde040a604a. 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/DEUM71103810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6f3c4105091dec3f0aac9b6fc993db9102c9e7eb3a2f58c35780df6664654b. 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/DEUM71103811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa147d9cee78ae785cea223b2e4f0e40d0b7ad8ab3ea251c210d8281c4e2456b0. 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/DEUM71103821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db7f5e7808e92d6f8fafce2a05386c9ebcdea5ce829e50bfe0b8a567a540118. 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/DEUM71103822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830923ccd14229db90feac4c9b3dfcecc9b63677429c0bfaef5d967da5634aa4. 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/DELJ81477946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4794129dc4fedf1b791bb2caebb5d63f4bf9289eadd963c5c7ed8dbfebc8041. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DELJ81809384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f650d3fd4354ad5264229d7060303beb0eacbe6cafd7fbba74629f64aad12f. 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/DELJ81809390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830ef165db1de68e32e2ff35a0e63114bf17c11d77706afc1cdeea515ee57584. 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/DELJ81809407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94fdc4c83d9d6a9cd92bcd528d4c74f89ff6b84f3b6fb4f5a75feaae696ad47. 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/DELJ81736239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf35e07668c22fd73d4ee6e53b3239a1409d8c7d95fdf9e0a08946a57fc1000. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DELJ81736240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f5dab9aa9c8e3841c591685b6a42ba6b1bfd7b4ed9d340af754be8abfa2877. 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/DELJ81736241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3dff1eee29925e2caa82f5226b5399153a022a19cf929f3e3f431b2d9d6518. 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/DELJ81736244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77972228240ce5abaf9d6139728fc3458597ec7ac8c93347b6ede1ba82bf7d67. 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/DELJ81736254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209ba98d61896dc7babfa8660ff800c0cf0f49be66e4f8e4225bffe43ed475a1. 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/DELJ81353265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170751bfd673ec54ff39bec177d1d4f2bf0e943b71b8d0a125ac0a32af0838f0. 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/DELJ81353271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0034847cbf1bc687c1fc3782ca662c27298053d865829fab6c5ad17e4414b9e7. 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/DELJ81353272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1bb779f21e31024952928f709d501f4e514ec2906b67f148bd6376f0322879. 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/DELJ81353277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3619e3b5c7b92299156e3d52b3dfc5e87bf31a738f7311e8326a7d8a68bbe08b. 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/DELJ81353280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258905871bf4791e1c4118675b73eaae2f0dcf3dbba0bcae29c8a9a4a3ce3475. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QM6N22142759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417c8aab5262518fbee7bf5d7e0820713df15e6c5a3263d1cde0e6964b4cbc59. 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/DELJ82009822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143224c5d379746d38b93ff3ba34f3cfa39224507253f7372639deb2fc81fdae. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEET90600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c971609f1fe123fb88dda8ca0eea3e68b2cafa88c2385b23d3e55558c6997d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DELJ82009764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523ca7401c90152ded89f928880bd1f879650da978f91a319e55d5a26ddaa7fb. 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/DELJ82009774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f01dc4ca8d1fc828c85e1e3c28d7557cac63b22838793f2844abcc8ef797abc. 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/DELJ82009782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06b33dfce249556ade937cd1e94e4c50337c7453f5004f3833a706d9bb4a872. 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/DELJ82008246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd431c33960b711e823d05b5435b33186c1422d1deccb60117816c2770346a0f7. 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/DEMN91400285.