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 0xc501c4d8bd55cec7b62e3e8622eb530c7c7641a4401e68dac30a7ba087a71d03. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc871a25-0561-4b90-8b5f-0c6202fb3cb0.json and https://artists.proofprofile.net/proofs/artist/dc871a25-0561-4b90-8b5f-0c6202fb3cb0.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 0x0d0bd731fc19b6546e7b1545743019c79ea4792178a409f628883f20c085014f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CAHQJ2435238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d175c800f5f846eb2ead901d7f8c0860194a1e7e6497fa3e86bd420c183f31d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:11:50Z), 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/CAHQJ2442731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5928b034a18762757b84e0764430485c6f234c8fd4573b68590c3320d12f317. 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/CAHQJ2442732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acf821e5e1ccc11f757f1dfd722e5233285a38dfab9ecd1d0511dd0abf63688. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:51:29Z), 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/CAHQJ2442730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d6c6378f1397ba6229cfa8f911ae7b7ef73bd04b985066fd4c397fe68a69fd. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:36:46Z), 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/CAHQJ2442734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65339bd7c3ae2ecd0bb3e8f744f1dc19523d1983f10dfe8a82fdcb08a8b527a3. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:34:34Z), 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/CAHQJ2442735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d534847df563badb6fbe3e53a0a075c0fe59cc2d7f7079f6d8c055fff9cf23b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:50:18Z), 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/CAHQJ2442733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b09389d55c0969fdb653c9f8160c9561d8ba699f11b7b266b5476b5b6b8ffc. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/CAHQJ2442782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a633953c1cd91afa620593b17ab725bb470db8c7e20208dc65d03eac4a10936. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:30:24Z), 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/CAHQJ2442779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32377d322c39c30c5ff8faa73882550523aab6b271018e6d78ccf371f1561d35. 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/CAHQJ2442780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2133415f5cf943a500d67c024c525d1a86a8e6fd89364f1fe00824ae9f9dcf. 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/CAHQJ2442784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16ebdf0183080610118c8f8126b267b1f2b0df00bd514d0ee31d458d888de2f. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:01:03Z), 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/CAHQJ2442785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b76335af05f135b888bb3e77a5b8d9b12bd303cd0a193690b0d47d0521930a. 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/CAHQJ2442781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6f112dad00107ff2e52df40209ed2de722d1b0fbf0b6c2c6a28758fcac6d3a. 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/CAHQJ2464101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935b2529cfad4a387f00a6c9c45bd538ef028100183bfab7347f9e0511e3cba0. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CAHQJ2464102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508c40cde2934e2a42feaac8628b50801cb7be5a0d9ac8fb3f25bc00c4e8f3b4. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CAHQJ2464104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f64f3dbc9e8401471d029c5eb1ef71f7af4f3944b2037ef492db295002b3c4. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:15:52Z), 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/CAHQJ2464105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0448e599f150a1efe0a77f11feee5e45025fd122462d8bee82aa4a866292e89f. 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/CAHQJ2464100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bead9c357b4bd2fe88a7e83e738e633acf4ad0052fa5cfe5d13b6c9bd9da00. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/CAHQJ2464103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6eedb9e022d7aac6dc96b655731fbb2547963b14ef0389f5de486232d0446ca. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:57:54Z), 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/CACWV2499375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50ab7c817903a2847c99236b7934e2d458b0db65dca4e6ca3749c9e09233081. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:30:54Z), 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/CACWV2499374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79630699c698ec9618d2b99925363043260fe23cb75a7ae3b3fb116fdb7ad1e0. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:39:32Z), 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/CACWV2499373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4814846390c0daaf75cf0558b39d26b2d6b7fbb83e0785641d0b844276a8fa4. 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/CACWV2499379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19e4fb55e86d59305c27cb65c31999b7e7407a1c9bd800155ede505a0ede503. 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/CACWV2499376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9357b8a45ce5282a641c91e12c59e1a9b6ef8140d2fe872b331d13ab40a0d3b9. 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/CACWV2499378.