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 0x2d26ec87cd40a7578949ca99415fa7362ebdbafcc86952d124c8d1b3940f4a9a. 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/56ccdbcb-3f63-4c7a-a3b6-a70aa209da8c.json and https://artists.proofprofile.net/proofs/artist/56ccdbcb-3f63-4c7a-a3b6-a70aa209da8c.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 0xe74633031d097a07df48ab4467332564d3a762a0bddf9cb3d76813f34169ef66. 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/TWX351902086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3711537282ad91b929bfc494814abf89496f2a3c98ff6adb4217678cf2f5ca. 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/TWX351902090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dedb928fb085d0e08cd6171d5be89b14c3ba8d2df7899eee650a118f27cafe. 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/TWX351902095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6091363f11937616e7450e9a72b0dc3c00d4760a2782d35a8bc227057e2e2b18. 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/TWX351902100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb074069c86345166944b043f5dc4124d24d45b1aa37be6f41060a35e753ddb. 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/TWX351902102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5022af2940ca4cfe1d0ef396ab96b63e535d95f48433b09f94e6aa383f489ee9. 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/TWX351902105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8aa4ae6dba05b6f9be4411d37a562d3b9ab4b5d51c8de83f7e351b5ef27f03. 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/TWX351902108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fd4de8490bb2dba2c41a28cc67dac6bb47cd1dabbf399dac228716db70c74b. 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/TWCT52434088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eadc18b8d0d3dbfb925a076abf5c092f47d1ad7667285e53335d0cb352d0063. 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/TWCT52434092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1389c18bb80d88f12746d5a5c8f336b6f4388314a42c2a15800d9b360ee0481f. 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/TWCT52434087.
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 0xc26a23e7a1d7c2141d1306a8f78801e2c414a22d3006d24fd5f475904804d34c. 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/TWCT52434101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7a62b1c21809ba84c2954f5cb30ee39d28ef4a1761e372a81c7a2ed335a018. 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/TWCT52434110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4104e1f2888201781e9de291761fd25219f57b4929706427740c2056ca1397. 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/TWCT52434115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1661607d27c7a6c06495c49f023fe9d3bbeffe2869352e7e58585ec39802e3c2. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TWCT52434109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768679d26eb2b1124d20417d4e45b27288569fb203f80e11a5589fa69fe42289. 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/TWCT52434137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d553062bc03530fb5bd7c1cfb99e04c751aaadc5b45eb7e9aff70f8157117c. 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/TWCT52434139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2000ef3b881d4fe577d600dd37dc7330c167856e151211a6c5235df5fa2f7275. 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/TWCT52434140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c04634fd1efb2322cbf56be5ab4ef364e5f8e6a595334ecc4de76b323e090f. 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/TWCT52434145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dcea7b1e5653f3853fc06bff8ed3698c33039f98f9135a78e0510b86dc539d. 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/TWCT52434147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c6285fda39ce07cccf4929db41b8d4f4f26a4231ed11760599b1c0b7365e32. 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/TWCT52434148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e063ce6bd71b74fa5c9b73f1883979e17ba603467592a8f54097e6e6456c82d. 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/TWCT52434094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe8377aa9a8a733f0fc29afc4653d4fe912d7f3cadf62fa48d6bd65e2bff6d6. 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/TWCT52434097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18ab96acf4210b725ca0ba779101f40e9e7af2b745bf10e057a90e740fc6b4d. 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/TWCT52434126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd479f4b738f5cef3429c30586a486c5ab5b08208566716ebabd545f46268ed0. 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/TWCT52434128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b552277ab3c78dc3dc253a0b027ee05187a8aa3b0411703f56ffd6877f3a859. 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/TWCT52434129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc2c4a32e4d773370a63cf357b98f04548016aba21da80fa9c43cb374fc59c1. 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/TWCT52434132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe789558889598522a2d314b351b8a36b2b56bb8317206d7c9a3b3c021a640fb3. 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/TWCT52434118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380dae433e8f58b2ae08b36a9fb309f86ed52a5717d8d7c4ea525dc3dc6a801e. 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/TWCT52434119.