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 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 0x0575798cd985737cd97377dfb66ca5ac2c299a25a27729ffec739b048f1a376f. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2183765-9f28-44f3-8a01-7d54f6e85703.json and https://artists.proofprofile.net/proofs/artist/e2183765-9f28-44f3-8a01-7d54f6e85703.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 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 0x4a7136e15ebc8a837b454e67785a95eca37daa0fea93ccd1f016306c4711a103. 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/USB4U2421001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482c70a197c1d1d1bd24fd8dec6c775e00f657c71a4ed4cd1d145933d9094afe. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USB4U2421002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe150e245c57229c5faa44102640c1963b84dc5e8ed628d81eab6c70cfc988506. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USB4U2421003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a34ca4dc1da5785da255367090e113c78d079de1e040261b1d2fb43fe662a46. 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/USB4U2421004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464d7ef1e2a97eceebdd0749b3c68a8ecc1269ce83f71457a060b5089d7b0bc2. 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/USB4U2421005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc08930b18287f0089abf484a801cb6d95dd053ba4094c93149f814b2c3d6f9. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/USB4U2421006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa660bd99439e9e3819619953405625c2844626b63e2379513d9537a7595e7b2f. 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/USB4U2421007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e8c526f8cb3c017e4bd264d715780583237858853e4ab723dfc8f2cdf34163. 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/USB4U2421008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9918ae8dcc900b9ac9e5345edceafe93a5663453606f92888d564066a65bc9a1. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USB4U2421009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed6551c431595d984cdbf9bb5ff856a4aa6f9f07e06984a48f49924bfd6d3ad. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USB4U2421010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56a16d4e3efb175a2d1e3d6159b1839e1cd0d2f3a21f1b1214a129101f10773. 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/USB4U2421011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cb64452fee09d4821c0b0501513c820846e210002af0e9ee8223b25532b6d9. 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/USB4U2421012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254da6c0c86acdf57d109c9e372e686843f00129b7049e7d466a185059201a20. 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/USB4U2320101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab90a88adbb991e71dc4920d8e8b6e4342481fe447d02c7131f4107936624d8. 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/USB4U2320102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124198bf9913788b1043575e3c579824a21d3b83221e3b38c669872cd3e6838a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USB4U2320103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cf6841d975517fb0da4f03dcdf25f8437ba595dfcb55f86fd715afe4823773. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USB4U2320104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4588f4d47db7e48357a7ad12888c45c1ca55a0ec2d7507126cff79d2b0387c43. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USB4U2320105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5751326f329a8e5d778c4c594930a624b8631b4d5b7a07faf821463257f70e. 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/USB4U2320106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530d589cdcf102c0e6c819d04b2293c5edbc577ebe5bf75950054db61ede7e90. 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/USB4U2320107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68287071bb5220995a77acfa02342ee2b6736a8b748deddf9a775455ad4e3f8. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USB4U2320108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacd2235282020a6cbc79b75a678f5499bf7b9337ebb4fbb4d133cc77c633eb1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USB4U2320109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b6d2baf0afeb6256f08b088d2f26f5069b3c55c0fee1d7fbe261136db6458b. 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/USB4U2320111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60084f0f27e0cc2273f6cd36a0fb96ec267b42c7cb0a0f9b9be95d9e8c3ed25a. 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/USB4U2290101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247f20b09c2b536486064f29d4cc0178d9ad70e3e9f9b9ed777711ba99495353. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USB4U2290102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5248113e052249a0232921d68863187c8ba9f0d0ee4d46f62ca14ece7d8dc1. 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/USB4U2290103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7356d5da45bde2bad9a418527df524ec962ddfc58c34830b9d0f4d5ebc6d73. 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/USB4U2290104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565584bd025d7d6dd58ebfb5ca4deb1c4f85b68b42346ba83873bc20d426adce. 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/USB4U2290105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb571cab617ae310bb5b4325f44dc3acd8a4cd53a5a30300097932e9249330520. 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/USB4U2290106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9091c2e77dd76137d3bf6b4ea2f26ed3746b7976d2e57101592ee04fdc378f. 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/USB4U2290107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29e6639861b9549b7071bfde7c319031e4739096164bf36e4e45979a060e4ac. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USB4U2290108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb5292ae023a9ab20eac337e487f8bd16390d702c902484a17ff106c1cfe3d3. 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/USB4U2290109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676ef5d723043e282edce4677376beaba8a03501046fe8381bbca7919cc05aac. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USB4U2290110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f368251da9fafaafd218d8f0dafcff4b4ddcb326b5c8715c52cc3280e506bc. 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/USB4U2290111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05191f9ea3344716259044c4609c3370da7384048c2703e6b863569844529214. 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/USB4U2290112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2048a48c55658f02c309c4666416d9e5a1325996d76e57a0f899c7e75c0ad69. 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/USB4U2290113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd204908b350a7d669bf7bebfa78a459b64fd89a62e46e0a94b5331a74b4b935. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/USB4U2290114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb683164c9fc2caa188b3e1914eb5f0248fc6dad8cc82f180f1b855f6a4f989. 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/USB4U2290115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad6f46099354f5355a9a0989ac1d94d7936855af166e5f24cb5b0ecb8bed856. 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/USB4U2290116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4ff424a5b45128fc35a039a9721b9a52f2416ea8653c1a3e67da8c60765333. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USB4U2290117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa660bd99439e9e3819619953405625c2844626b63e2379513d9537a7595e7b2f. 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/USB4U2421007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222ad32dea05533acaf8c1b2769d5b2f659e8c33adc9b40ef2b76513ede45fc5. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZTB52339695.