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 0xa012f9b2de32c6bd27aaf5f363f2d37aa8fa20cff17156c878f8ae07f54295af. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e39721b4-21fa-4a72-a001-f18070ce1105.json and https://artists.proofprofile.net/proofs/artist/e39721b4-21fa-4a72-a001-f18070ce1105.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 0xf19b29373f0c680017c3e7512225985c3f638d301cb0955df9e1e77ad7cfd404. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:00:25Z), 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/QZNWZ2311974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8707b2be31b9d09ceefac194a1773b5771698a370ec92c350dd5347918ef940. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:15:21Z), 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/QZTBA2310322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015ee617748b7f10e73212fb08de828b8061607b46e5d143a6be291458726be1. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:01:19Z), 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/QZTBA2310701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbcdefb48cf5ec2b30ac06d208c62fd6b32ea9109b0ca966b9c55c91799ffbf. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:27:03Z), 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/US38Y2308822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cae9c24a9886db5a12fa181db7101699684086d8b2ce54ef684780c98a30c06. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/US38Y2400901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f0019d8d9a9bbd55b509f2a28389a9978708fd39527402a3892d09a743feb2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES72487204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb86f613bb8f79355725c18a659fb5f8924eb330b4eabfc97f8b0842c691e5c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZES92487153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9d3f28181d7914039cf7bb9794537035a103214068e0a22bac44aeb777cd5b. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZMEP2413049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f85f240540b80f5820adecf357b2db426ec6509282c1bd4bbcbe855068368b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEP2432610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421281390287ae1d64b0dbaed20de324501e0084297cdd624af7956bd3483bb9. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:56:31Z), 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/QZTAZ2499595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e629ed2784ece4c99863ad5c4b2ecd54e37e637ac10b8022cdbd93db1d553f. 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/QZTB22401538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25deda6567efc0d8eaff96cb8fa312b5d6e55a572c3cfdf2f3ac3dce84caaa62. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBF2457904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd3ced3a5ccd53bd534bd921a2ab5320262667a7973b765a05105513d921750. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZTBF2448285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b18a6990186ea7e4df79bd04565a0ae14e71208fd69d1759a0848dc2d08d322. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTBF2450947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336075871876f9a0e3c4c81615973dccf5cc5f09afdc976305a61d9ccac7d296. 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/QZWFQ2404556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97322c15ea6a39c6e45ee789c89afebf295e15d565ad699936f3b97decf17ffe. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7K2486190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161e4ff79399912c4895006bd0d0dce9bf47e5e772971a245639403d804abe9f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZDA62578357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810e0c8bf41aeb58510fa4a6c1d152fc0d0df2eaf3e35df7e02c77df9b0f158f. 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/QZES62590101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a757b70888bf7cd75ae708eadd522043ec26d00e9127c62c2866be7b580841b. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:43:03Z), 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/QZZ7T2467788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f49902e5cdfadd87fe6cf82ffd16533fe545b5f08d7a2fc33461c5623b05650. 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/QZHN42577512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfd7171a2d334787a84b513be63df578a5dbbd189d18348b3ff1f217b52d4f7. 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/QZWFQ2555551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112d24a34ea9d12b6ce20c324aee27bc4d2312a5ed05ee286161c43063aa92a5. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:07:54Z), 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/QZZ7W2509035.