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 0xf40d13a72d64f083fb8355cd06f626d9164ff2e73edfe7ce8f41aca552ccf4b4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d356a59-d834-47f7-92c5-3a2a6b7ee3cc.json and https://artists.proofprofile.net/proofs/artist/8d356a59-d834-47f7-92c5-3a2a6b7ee3cc.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 0xfe5e1058eeafbd7f5a6c72eb59483d73cd330c1885a4f1e7fdc4d48c46167276. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCADQ1810766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75093c71918518e334a8d532bef3e24b04eec44bf62206cfda47f4b4c797c08. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAEK1914174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8cc7cdf115f403518b823da1ee07f63da50f8e90194246314e5e12c878f7f6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEL1983097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761980baa44d4b4eebf2ef014736c78d8f78dd225e3845e612c28de126085790. 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/TCAEQ2092578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902f4a6ded7031ad83b08ea68b5e56a2c51d9a027c379f4206ef6dad849d152a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAEQ2092392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7152ff4090fca0e0baeb0538f5b800caf2999a380b6e13f3b844db7935af844e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:20:48Z), 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/FRX202257861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c819bfb7a8f9354bab999f5b5d4cf76cbb669f8dead6c334cd087f7b0eacd7. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:57:50Z), 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/BELX42200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa391f4c5268ac842bb6c5d8801677d725b412643e2c6f0531de3ae37308e9ece. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/BELX42200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f33483c9f1d432ba9de3210078c38510e58bd30f275803b294a29365235022. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BELX42200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686911d8381e4a8d40ae75649decad9c12dfb8d7ac30992af907d25ed5845bcd. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:48:39Z), 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/QZ8BZ2201144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1219e6e8bff7b3407a300ab932bf6eea669aea0948aca5b26bce96d2fb429fbc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BELX42200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7152ff4090fca0e0baeb0538f5b800caf2999a380b6e13f3b844db7935af844e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FRX202257861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8de5c3d32047b8922107284f0f84b8484bd2b999a96a3bea2032f50f186fe1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BELX42300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b7de851769209631d1aa47414773f9b3bf9ca199c1e5aaf40cd690eefacf57. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BELX42200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9884b51c47c7f4485655e4a10c8de04a003b44ce79f8a74e47c5642585296f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BELX42200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e68ad6414a4bb4c04baeaf1f2fb6a0a30440cb02704276a2d721fd39423ef4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:46Z), 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/BELX42300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff41228774dd026580e99d58ec0d502b72b724db99228ccd74f62ba0f4a79a86. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BELX42300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483c62ba9011351d19301431e93335b254d1eca3d3f0dd583e85c7f645d10449. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:00:12Z), 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/BELX42200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d862c536231d6e1dafd98dc25e7f77005e32d2ad3acd5fb9afa1361fb861f8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:12Z), 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/BELX42300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f2501af806440ae70ab55c7ad2eb6682f4984e3f55850dc3837b361a1b40e1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/BELX42300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2aa62a932faea8c08ace1bae4031f673172439259c1a0dfc0b719faadd09e7f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BELX42300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0678c6a2358c4b6a0783a0ae20387101128c10e6d7c2aa56b5b75e71a2ad53. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BELX42300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad3c61107d5dd7b21a12e1383be7cf95ee2f54d9c2958b21320d83141d88f2c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BELX42300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7ef954754310979543017df924ae55986f19aa9c9478d0592e7b9f9cabe1d3. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:59:39Z), 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/BELX42300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7df28d1525fc40ec52c43ba76d916889b253aec51bb967e6c532c1bf328dcd8. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:12:39Z), 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/BELX42300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad3c61107d5dd7b21a12e1383be7cf95ee2f54d9c2958b21320d83141d88f2c. 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/BELX42300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f2501af806440ae70ab55c7ad2eb6682f4984e3f55850dc3837b361a1b40e1. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/BELX42300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7387bdf0e52e20599ebeb42ae32cd90d88e725f91d0d766999a8957562f587. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BELX42300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997873333128087c8fce0e0de5d8762a3d98570e1b177479127ef01819bae9bd. 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/BELX42300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dec366ba60f2f247485d9b3393db0399b5be0cc6aed203cdb3888a277c1cab. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BELX42300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2aa62a932faea8c08ace1bae4031f673172439259c1a0dfc0b719faadd09e7f. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/BELX42300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0678c6a2358c4b6a0783a0ae20387101128c10e6d7c2aa56b5b75e71a2ad53. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:28:04Z), 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/BELX42300022.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac763d126c1a535a1437e5f6295a98d1581bfe687ee19b8542f601f6f6c7bab. 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/FR8FB2405700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef16cbf70d7f4ccc687c7eb37bb23284d250b964d6756303f11166544be3fbaf. 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/QM4TX2500252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f07125569c9c6389e8e875211b365b493e8bbcc8498c2c61ab2a5fb2517a46. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR50K2400180.
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