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 0x355c4c14909c79a28bfff04029c764f2b8757682c5fb1c985dc2b0217633cd48. 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/02276853-1f03-45b1-af70-578c72311099.json and https://artists.proofprofile.net/proofs/artist/02276853-1f03-45b1-af70-578c72311099.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 0x86cc582eadaade4f3e4d15636f2f3cbd07a1dba0a72b684bc9eacf707e41116e. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/SEXCH1600403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced9e571bf47255467fdc63ede94146ebac52a810a8dfa6972336e95d16c63db. 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/SEXCH1700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1afcff47e95d9525f38ee0da3dffea599f0709f1db4392caad8645cfff399e. 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/SEXCH1700103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91be6a67ecf9fa033b206f9378dcbf0169b50c9279686b5b679e9094f0ea1df2. 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/SEXCH1801001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6048c4abad1110f079c0fc334fb55a40318769a414360cc8dd4e5ba579210ec6. 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/SEXCH1801002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d88ead8d8f8c9e99c50b9eb13d8d5d2a6de866d9c20a58b59619bb6203c6fef. 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/SEXCH1801003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce0b35985b94623fd8fc9921d4d08073fdffe8b23b31ed00617b920e90cbc4f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/SEXCH1800213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e04f71456c1388193180cce1e3e2efaf79fe8e77bbe3177922e3552904257a. 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/SEXCH1903202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3761eade25e18a6f20750843ce90264354e9c242257abc7fb09639a6259fe7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SEXCH1903207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839642d7ce3d221ff0fdd8d587b28c16c2d0628352cbe395452179e75295a71f. 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/SEXCH1903209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb02e9b41e38778a745bdd4096e0741c86a57cc713af80c9e99d5422732e277. 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/SEXCH2001803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb474b1f4de0eb4829564d4a71d35bc47095a9cac89bb90b2416ce0917320486. 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/SEXCH2001804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7c2555b13c0a44d8587412fbee0e779f84eca6c14a1af0989cd0f34c2fc2a5. 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/SEXCH2001805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73397fe357d7b3797b4f907221e3c6816e2cfa899230aecacd8d999bfa93111c. 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/SEXCH2001806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c73155e54f64ef4618e1d514e3876f0db5318016ec20f921c60ae3ceec8043. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/SEXCH2001807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c3aaf7d1f70b8e43b320f403a04388e48998510da8475cf624760eceab4d46. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SEXCH2101406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81141612477c85ecbefa7543ad690e0b704dbca7432f8295a5220e0cbf3e0095. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SEXCH2101407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7d4b79cf46aa82e741a7c752a52bb7f7d0baf196e2c5074c977fe863aac140. 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/SEXCH2101401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c75dcb7c3f86a00bd44f8476a14dca1776f39b8e6c86f789146fd5822525cb. 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/SEXCH2102802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8821c9aa67db08dcb009f0b05dd1ea658ec3ea523b4fa64689aafe09a1a94983. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/SEXCH1700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c941256fc02a7eaa34f1cd049f48715988b8910dc63b89079bffdfa18cf6088. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USA2B2209142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b90fe3130752cb4c7ceb946b7d72fbe068a1956ae23ccc12da1f80f56ad2c3. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USA2B2209145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af85483f43f6129b4d25d0e260ff4c774b5ae629561d5f8680006086a5b4833. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/USA2B2204503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566344e52f94fe4d49a985b4dc2dc6b9f94d266bc7002676242acb5c95ead2a6. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USA2B2209167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74a5ae958db7a86d013b2b35cde008f5c1159b75946c55f05aeaf7636e1fa26. 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/USA2B2315909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1557526fabf21837b7dacb3fc5c05eba9e9e8857fe8ea2bf686ead8789109221. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USA2B2318203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3ba0c8d739a46d8fbd885a558df4df0e99779242d4b79b6f9f6e975239f2c7. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USA2B2318738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf964c84f6a8d0b527a873fc29f6e2d71f03bd8b3013eb784b330a947395489. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/USA2B2318741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c42ecc046d8d6dbbb764101b63cd1b3dd6ca13851f0698a5048d1dccadf82ff. 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/USA2B2318742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08315004547a791ca43f78d546de91e68b56f64f452b5160bb26a2fa0fddb59. 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/USA2B2403645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fa8aa76a2c0d213aa4bfb4ce5a9bef52aa571792fa94a758ad1ed5d8399cac. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USA2B2403646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d4ffe5d20382b1e3a6d2bbc31ea01b2c67e5e014ffdbbed8b97ced3c88fe34. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USA2B2403959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fa8aa76a2c0d213aa4bfb4ce5a9bef52aa571792fa94a758ad1ed5d8399cac. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USA2B2403646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c88308163581b2a92fca015d5ffd4aaa13c55b5b2792104ee0190638eab4dd. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USA2B2402007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fe8e0e8d96a9ca58546eb2fe2d3b53ca805eb98d15fe4af9d6d9bc4b331a31. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/USA2B2403992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eac15b8a32f76370cc3c25b3c5890641da4dd30d53c7cada7b7cb90d178acf7. 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/USA2B2403993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67c73580fc99bab477abc63b6203ef13d9eb6325612a801b787fbdcd9756230. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/USA2B2403996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d51fd4016929d2e73bad9a52c74b8410c40bf55e2978b416ff1257827de6bb5. 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/USA2B2402008.