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 0x2fb07d1cbfd118e0d18261fc29c413bb3eb3533547c18c040cdcc3959f527c02. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33db1548-e756-46b0-baa9-688e1fbf57db.json and https://artists.proofprofile.net/proofs/artist/33db1548-e756-46b0-baa9-688e1fbf57db.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 0xb9bd6640727d2d97c93c02c2a730d1a35c6caff7079ab1fa64d76fad5f3e360e. 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/NLM971900418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b5c142a48740df24d162b73fb7a66caf95726df34a10350d23cc90fb6d6eac. 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/NLM971900419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce8456a1c1bd121d48a4c2099805825ccf0083d6b34e0cd2e4109554cedd081. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/NLM971900420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69d4cc1e721e9cea3e45d2fc3e53599cccc3074b3c3de49f732f6f4d9feded8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/NLM971900422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8077a4f9bd0a99c8f64f0a028800fa3e44e8426806b1713b398f66b9a94679ff. 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/NL1MT1900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9da579ae11c84686044c2dc45ebb5107558914c21fcdc45edf4fe51a389a3e. 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/NL1MT1900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d0ff76a4d52b4508c83ec250e41a3c19741099dc50006ddf75acf2f0c5dc69. 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/NL1MT1900078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3859c4159d7c5fc18dd79b35d45d968b36ad557758dac4fa9b099ad5d936a91e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NL1MT1900075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de0c9b8125f07519d8a38af7f4ec16265ad9372796d8b9ecff265be967b0960. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NL1MT1900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfebed81cc3e8e69e61020881ca44ccf58a026eac744be459b1b0d380d4f460. 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/NL1GH2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8848ffee4295d81ec835432cf91d4f20aee8995e8f20972ffc6998dbe01081. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/NL1GH2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa331107d7c1b2a9c95add20c26bcc183e4e42237b68088e9900854b29a4b5f. 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/NLY5F1800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5647855df798ea303ca63f408fe30edd338037e3d2eff1d58904f146365e7b8. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/NLY5F1800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a3076aa9e1c863538fc236df76189d5c3f4b8f6b447ce272d74cd7fcb30915. 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/NL1GH2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f32ac4d763e5205c30e711c26854d503ef00a408d0b5815bde13d67bf6fd3d. 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/NL1GH2100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed3ee5ee26dafb967894f68146f50309f7ceb072b3a12af5cf658158c938ac5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NL1GH2100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d41ea17264ebb39bb2a31909940823120f6f76a33ff0c015158ac8611537ed. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NL1GH2100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a58ed2868ce678dd2d4591d6582043f2cda65134d83b83ef2174e6ca5696f9d. 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/QZDA41932363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466907ed8b5ebd7454b6285ff1402964a2bd93df2c6bfd80d7b419ff50a43ae3. 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/QZDA41932365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edc62da02810fff7b61b44529d1b4590fc95c7fd6974c621c93d2595e5787c8. 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/QZDA41932366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd637f5f1075c341aee70c23b2ee2dd59d81df27c4cc2552cea2e160b6e59a68e. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZDA41932362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae8983ea23aca5db73685044f35a89245b092f458d52090d0c51cfbebe252bb. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZDA41932364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2018cc6e0ac2732b4017433c795b5ecfc80447a96cd686507af632a090c6ac6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZDA41932367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cac106462eb9ba2f9f72b68ab678906b626817f77a3f6e8dc640747f6d72b7. 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/GBEWY2100171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13bf659de5f1e096d0448ed2bfad6649b54ce0fb99d80f0655ac5fa92af3c41. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBEWY2100172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfec367355abec163204af4210e7ab990ce33582171b733504c4d89db1206993. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBEWY2100174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9258f72167f09873b434e4ef03113d8811d6c36b04678d82dc900cbf3ac70b9e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USYBL2400740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04bfdd8dd2bc84b2ccbc3fbffc5d9241c5918dac880b290d130cd6940817168. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T18:07:22Z), 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/USYBL2400739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98476e5ca329fe63df12d18d8129542b7f13166c4ab7043b11b9928627263fa3. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USYBL2400743.