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 0x4c81d1810919caa95b58c1a003be813281f650bd3e0918a3d8248417475d7173. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/186f237d-cf4f-4bbc-9cba-cdf3b282a6aa.json and https://artists.proofprofile.net/proofs/artist/186f237d-cf4f-4bbc-9cba-cdf3b282a6aa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Christian Kolonovits: Antonia und der Reißteufel
Cabaret - Live At The Olympia In Paris/1972
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 0x1ea5785e01ac7d8afcbedba55cc2e3bd295229a366f47385a7655089d9f415d5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USAM17300331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb322d73986b57afba035a630fadfd247b2235cb96ef635dfddd320943ba569. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLA508322509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5e5be39b118a82f2a0e3d9d05d841c9bd4fef38fd99c7e582596e5c8ef3c70. 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/GBF079710730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bb134e1abe48b6a1bfc48e354bb4699322092a69da3defd68d2d467cedc7f7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF069611700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedf7b1132af253f2ea0a4b0768a514253be2cc9ce8ba803de602f81c5b598b8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF069613840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8a352a05877913fd1205fdf7f166cc12bbe5e50b80655659f170e33df67b34. 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/ATMA40501464.
Die Gräfin Mariza, Act I: Glück ist ein schöner Traum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3097a6f71a027160f0508a5dd53564fada14e21f57e80cf509d0574a806d865a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATMA40501465.
Die Gräfin Mariza, Act I: Lustige Zigeunerweisen (Mariza, Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c242a795b40c89362b902bc67fcb68e398404f28eb25c0f126de61cff1409b4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATMA40501468.
Die Gräfin Mariza, Act I: Ich bitte, nicht lachen (Mariza, Zsupán)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e861b13eaa1beb7e711d1c82e231bd65b329af6e2349d25ec5367809276f33. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ATMA40501470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fab79dc147c68243e89e5ad07e7dc33cc68c07dd99e445c2e80679ff15ab23. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEF068807860.
Les Misérables: Schon So Lang (Rue Plumet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a22e98b04d8f3f8bdf06acf0246433faa1687ccd6da74c2939052bd139a8123. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/DEF068808000.
Les Misérables: Ich hab geträumt vor langer Zeit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d849131fe8f3e8eda1d9e96565d0255a951845bc6a496fe01d71ea6eb6e248. 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/DEF068807880.
Les Misérables: Die Prüfung (Wer Bin Ich)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c43f10fd84f18ca4a4961c817bad58c6b3503c4480b978e206bdfcef403c162. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEF068807890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb60f05b764998d96b3ff4839c245e7f087d085138cbaee5da1d39ad9c1cf870. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEF068808040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d60857584a44ef4a2233ed51993a913d9b9b652e816d06cdf8a409738f2883b. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/DEF068807900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e9ea473bfb37f383e4282e44fa4ac0d2bddb78b51cd477b9e0a9f15eb96d54. 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/DEF068808050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e69dfbe6b8ad7e7450b17af69db5a37c195bec8d3210f6d02bb81dba3898f0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEF068807910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca40d2fee7af96dd19ddd95413fce741dc7c67d571c5195a260e0f37d904d0c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEF068807920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142157bb77ba792268b827f1b057ec4d61a442507035c0dfacf68beb2b835fbb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEF068807940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36192417bc9920c5d8616e25728cc6ee387014f4137425d95bd170b1d01a6879. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEF068807970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3893bfb0d2a10446a5e72618993b9f6f683444707923d66e9edfcb3afe715954. 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/DEF068807990.
Les Misérables: Dunkles Schweigen An Den Tischen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136fd6ddacb88e2c2a83dd346b95321f3df5198fd45b2f891c8dcef7655dce96. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEF068808170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44003dd5bdaf593c013b10d7354b13ab9a10b703febf5384e2e1ab06b3475b84. 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/DEF068808180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeef81e0ab2b6f08b989b0c94dba2220c878a453e5c699f156ad679a2a6e5cd8. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEF068808010.
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 0x336cc110afffaae1da8c382058ed7670184171d8da37e06099a787a04cba4400. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEF068808210.
Das Beste: 40 Jahre Maria & Margot Hellwig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3712c7365ef6316161c70b23b759b6ef03f87e3fe67a484f228cf112d6fd4dd6. 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/DEF458926604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd06b048c0dd8ae4e0952b21f6ba8470b1847ff6d7ef0a5f60b0ffbb24eaec9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEF459716919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa1c732edec1b3ba9a4cf359a3d0c175d47b0634fd63283bc757b2919ef846a. 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/DEF459718417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99aca12c38b8992f05cfc3fa3bcf87d6340793e7ca433aafa7baa445f7c8ddbc. 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/DEF459718419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5054041d0ff2290bd624929f73353500a7f6a738497fee2d39bef905543f3d21. 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/DEF459718415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daa43429a1bfd65e5a35753ac7919364728b1579d5c5afe0dfc7b0340dfbfa9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF459616610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3426e25cd488e40d345fe83f13cf404875fc26dca2911e1b30d8fdf0a7c1e2. 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/DEF459718413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fb3b281a6ccf2f39f5a7b514f15a07491e7659986e875f554f0364b0cc0c7f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEF459718422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef004c83fb2962911febcc37153730a15ecbd54bad94ccc7ffd72bda24be190. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEF458901604.