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 0x687df861edf0fd740a80ab420d563f7827289e35f1ce43a02814df1ea91aa575. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d1afbd3-546e-47fe-a12a-a71c7f56ad1b.json and https://artists.proofprofile.net/proofs/artist/4d1afbd3-546e-47fe-a12a-a71c7f56ad1b.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 0x67f8d955193a8d6287a169f17e5cf6a5eb2de4cb49fa451f357d2f0582cb816d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:44:30Z), 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/ES71G1852186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bc74ae8f5015e02f30311cb8a2ed7a55cebf1807b572ce522e84edaec11fb7. 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/ES71G1800634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed93b0adef2d4c323275c36ec55bc682510e608f39a3921b179aef442844635d. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/ES71G1852183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31164491fdbe06a527008a8eef35be9e72c2d9ecf7a381b547e0e24a62b47cbe. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ES71G1818016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772d655a644c0d0e111fb22470b2a1c150235bb35cb8e40acbc271abcbf22b0c. 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/ES71G1852182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1609f5126833d404a41209803cec9374a6c43ee6454a947372f909c04c8dfe6f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ES71G1852180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff5624ab8e8837c687136129b835da50be659c7c9c10e82395c23ba11195862. 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/ES71G1630368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722f67a3c16dc5378cfa43c0aac8ad5b183e065e7126fb42bb358fe7a4817706. 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/ES71G1630371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0e91ed92b6189f2730daa16b5d25b3871d6c5564346252f9595eed375cfce2. 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/ES71G1630372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5892c5ed7e4437ee4a1c15a6b1314521c9fcc9d0e577d70bbe24d497839f42b. 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/ES71G1630374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebec4a84d23338e9ae5f1ba753720734e46023fb1645726258c73632ca9a2d4. 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/ES71G1630377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91864dd8d75a9f3157ae5d80bf63dd989c7f1576b25eb22702bb31da31026d37. 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/ES71G1630378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ba77bb7ef9dea1647cabe1fa0942daeacc2916b3e9ca160e5129554fd066c4. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/ES71G1630367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b773d87fec00da125f2a189e3ae998319faabd5eedfa4666466460b3119d81. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/ES71G1630369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019ffe416fbb398f49757fa5b4cee72b7d526cabb21e8774b6846bed700981aa. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES71G1630370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8aa023436561c586bf61583bdc0ace58975ec8fcaebcc7628d5fc247672d7b2. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ES71G1630373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ac3d84836229a55c037e266854222f2658c77042661c3870d03a3d28d9d276. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES71G1630376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e84b0c21d7bb11ec2c7bc39c5083bc91ce411be7a67bc938aa8d59e5b89371. 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/ES29B1300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00eb5f5c73631c086085f7d61a3a2e7e939576c3070e8130e5c16eb812fa3b6. 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/ES29B1300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a5a21125716f36eda96792cc0c69270f97f369a55f02194a14dcd0dfabccf4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ES29B1300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdd9807991ffa209874a75253b202c346913d5db8f57d3368d21f2e5b23a931. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES29B1300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc347bc635a17c706392912a64fefd02d569d73f4d013ace582eb1d53e128d5. 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/ES29B1100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563cad6c8651202150d567270355988359feb58a9e287f20a8fc9bf20c9e086d. 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/ES29B1100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23401ac9c03f656fc4e98f5d4a1a876f844aa2963bcd9a98e8044b4f46d278b7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:18:33Z), 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/ES71G2040972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb935e1d6352a22a58f99d08f25e7366856a05d77b5ad8b98d80e45e43b8809f2. 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/ES71G2014042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bc74ae8f5015e02f30311cb8a2ed7a55cebf1807b572ce522e84edaec11fb7. 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/ES71G1800634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65cd8bc0bf66c310f6311fadcdbd136e2fc9a15cae6767d7ccfd80fd8a3de68. 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/ES71G1749946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19d64debd8095fc91141c2f3d2c33f2522130027ce52cdf396d751a5ce2b901. 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/ES71G1746217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6987c685c95aafe0a040190d60fbc873d5b81bbb7aeadf56ee51332f23bce74a. 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/QM6N21432121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e95867f19d65268601599a491980efe19b50271708812b651f5e5ea5a0dc039. 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/QM6N21409136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b2403f0b6288bbd0de85e7f0ab34dea615f2bf21d88b2574394c2d2c3018fe. 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/ES29B1200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9890d2f490092406134ec697d6c1f2f2e32f3178717bf13eb7f6433f6c889a1e. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ES29B1200017.