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 0x7bb7a20529893c822b0a99f6370beb3a730f0e4a49a527d602279ed459a3fb10. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4342e944-a4b2-4b40-a628-8a73c7105315.json and https://artists.proofprofile.net/proofs/artist/4342e944-a4b2-4b40-a628-8a73c7105315.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 0x742a6ec6c6bdcf6dc568c838f5b7b17b4ee8ca93d3a2ee02d3440c176f4923a6. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F42528082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf0d3230864e35e2803430487cdf78b2bc0b46e2c72dfc4cf13b766baa3621f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3F42504747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce0b1fbc179d5d8dec4ca2bf831e72b25660844fdcc67f87a92d1f3eed862eb. 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/QT3F52558610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f928b3b5aaa9f4a9c727d97244081c345a90e0299de392a4f10da8316014cb. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT3F52522008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549728f6cac9fb15d89cad286a580eb59c2f257dbdd05dd93ef4f2156c0b1869. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F52566958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a38722a13b35bb99c7a620e7e5bdb057f0830e3cdc027a8dac8c44692bc67d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT3F62586483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5358250f65acd5f46030104d37501f90979bde5b479280c72c9c47e75dbf8704. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT3F62598545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7a06cd01b0e055201450c7bcf29773000c0ebb19130391ee376265750f6225. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3F62588352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69876cc85c56dc00d2a4a907ef4cd6e44ad43393f9f7df639df6f0484d8ebbcf. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:54:39Z), 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/QT3F82514819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125ce546979d29d620004fd38776a1de0f4726d6cb39ea6d345905f4f347edd7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3F82517253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c80b497c92936d46a9e4fcf31fc996db33ae369f6e2e06a185a757ea8c616f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3F82529404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573ba1dbe48d8d4a019c50194936bd41322938f39797b4b00433c640b8c6c3e9. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/QT3F82532220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f0ce03ea4c4a2ac1db9510779ee7d6727a784c9ffe9a71cd199ae26ccec813. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3F92570935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db1e5f8da6064ce6e93533565dc7959b7a712f1b6679327b956199b1e76395d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:54:00Z), 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/QT3F92575221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451aba2ce592e1fa671d9c4e592c258fa679ee5417b7dea83cbd0a1fd895f3a0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3F92577450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd98aac483fd3bb8fe6cfd68bdc61f10f4d70d5e5324ad11d839b941466f2aa6. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QT3FA2538506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc122fa6724efdcb0cdeeabdd1a0d8dda25009fdb44275d7083950dc5f8315ba. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:10:33Z), 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/QT3FA2538524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c47691ed85540e107abf17ec965b71fed1d05ec5b6fd94e2d062219239ee5ac. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3FA2538518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc54408abe4bc54a4f98767515aa038564beabadafbaa48a1830bea45a6de4c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3FA2575823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bc6fc0df0edd8d41900c5fae4fff13f54923575cd5b625fb15f677a9d71ed3. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3FA2578703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3513fd060029c82104a0468e95cbd2f6f300bda4ad6dc15c4bdbf413efbe620a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:52:09Z), 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/QT3FA2575592.