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 0xd3e4781fd6e3c21178da2d08976287ac390d7ec7ff6fe1ed60c0122bc86ff462. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa22208e-3b01-43a6-ac11-6b547d957c26.json and https://artists.proofprofile.net/proofs/artist/fa22208e-3b01-43a6-ac11-6b547d957c26.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 0x78ef6ee7eb54db84878ba2d14ac14a20897bcefb4d593ae3e4d170ea2d979941. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAII2417891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8c3cacbda5d2c2f6532766ada0ef7989e5e533d4c4d91e58d5a04610b27f3c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAII2417897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142f61b4ee792eebbdf15fe7a4587c22bd00aa62efd791dea3d3052fefc563ce. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAII2417902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cec095c6d61c07dcbe0af6d3c530556e68908769622fec32489e06c6d44ce44. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:17:09Z), 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/TCAII2417910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4122e18082928094ab2a3a2807caa7506336f6bcfbe6932d22b310f20e1bbf65. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAII2417913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b66942d54cb61344c1ae28026ff91d6f757a4658735bce1c75f506679fb78be. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:26:41Z), 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/TCAII2422932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b95e1f6e8467c53454bcabd686d135f34939c57e821f06e517ba9d496f6125. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:38:50Z), 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/TCAII2422938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989c40a07f9a1e7ed17fd3c8d3dcdd2259ae59bf543830301b45728da392db98. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T23:52:57Z), 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/TCAIJ2422940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b385178bc53dd5fa48207cc80ade7de0a4d5e589c0de4d6ef1c6a1bf8687c7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAIJ2422944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efc23a41a104a45603c2dfb9fae98d931693547f86db2bd6e75f611c85e3d4e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:47:51Z), 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/TCAII2422963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1398754c554f7e93cc20b6aaac9c6650a223341531576cae7c13d1b3f37e1807. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TCAII2422965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f61475e6274a5fe38e8c54081a59b62b9853a80b325e35d2c4beb480d3b524. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:46:55Z), 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/TCAII2422970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2b7eed0a86bba47729529301878ec924111e18f21683bf26e620bdf77f4c76. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:48:48Z), 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/TCAII2422974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3e7d9e9703a4cfb747986572b4139226c6601cf05c982c8456046e515c0d1b. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:01:53Z), 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/TCAIJ2422975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524eefbfc419851e58687e80aed58f603191f7fa5bdbbdcdc044da4ec450fbae. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:54:12Z), 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/TCAII2422983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc10c5d3f6c1598513231317e2317b28bdf0cc86baf0e571cb8e25740f81eb2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:45:50Z), 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/TCAIJ2422988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ca6561194f7d46354aabf8aa7892f30727824eb82352a1fd9cb64e79869190. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAII2422998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb2f19c0d148b7e7297a6190aac5aba5cc1e11f36dd648069d9326117375a0f. 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/TCAII2423005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9997482c94aa12935d77a6a6af30c9744287846f7fb27c128b74c9f63dcbd12. 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/TCAIO2400283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62df05f2e8ebb3253ebd409d75366e25aa7a4330c6edf384e3167195a951fd7c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:39:43Z), 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/TCAIP2400291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53959d1ae53944868605f311abf908d4cb32285b69238ef810c9c6c8a1cdff0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:10:21Z), 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/TCAIP2400294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fe488b9586b75adba4886013dfcdc3516cb5a40a264eb3738936651f57e72e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCAIO2400302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bce31c3c759e7482b25480a8233107fd344e04148af3c10e487faa0e3aaf98. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAIO2400303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f42f4f7f1067f87bc89ef6989a72c8a99ab2d21b15ee836aa9ced84ee17234. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAIP2400308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3404e84b793432a31aa3abf3c4ae08dbe8b6e7d0378ddc4adbc13ff9c660ae40. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCAIO2400311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc96c90e55b68ff6120c42a8290dc8942f0944907f6ea9ae8fdfbef0b04e9bc. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCAIP2400315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3cc5bb3a06d5a5c24ac3c4924ee67dca851e5e2da45529a5567e886bdc3275. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAIO2400318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe150f9b99ffc538819f8e23faaf615938f5dc6cf58d579ff859dad25b1de6dc8. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:45:44Z), 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/TCAIP2400320.