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 0x954034eef22196674eafed592ee37bc6ce0442403aad172001f268f02ceb05a6. 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/6b4e86ca-08a2-411b-9cda-be95bb0f8eee.json and https://artists.proofprofile.net/proofs/artist/6b4e86ca-08a2-411b-9cda-be95bb0f8eee.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 0x52a8964b9dbbba62de53b83b91bd6121b8d234fa9215021192db6b9e6e013c4e. 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/NLB150300349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb374206253ce2ae3a660587bd4c074158ce0b8d116772c3a01ab10a912eb1c2d. 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/NLB150300350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe985f9aa73d2b81750b72230e73b579f4ab232e186c68d9726c7bb33baa423d. 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/NLB150300352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c08992cba3a3a207df219891565c5fc644562d0f1a84ee28f471605f73cbec1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLB150300353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb0f9ef7e8f918728545e50879cc2293df67c9f9be9ea29277893ec6cd230d4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLB150300354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eff030654d86f73d66d28e4134efdf95a83be9c3415117347ca839e7a3827fc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLB150300357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6fbce6bbae039b2efd452f00d66b694d724184968fff97abc6761506f8059e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLB150300351.
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 0xd66e7f18d45c0f0d5a7cbe0b224de5298953f48617ea2b31d29d76c672fcfdb3. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/NLB150300360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a2affee16dc4c016daceffe215e5017f736c39a94525f0f8d210b4c4fc883c. 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/QMPK41800075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb16e0e70d16ca09d95e714bc2bbf144ef1ce1bac346cf16e182e658910332c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMPK41800079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e0ae50d457d04d77b01793f927e4bd6519b7fe2908ce3588fe04df863d6caf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMPK41800082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511ca1a389beaff4c2a17e06755d0800338c75e0931f5d289b25b14d6881cc27. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QMPK41800076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d7b9d6519298f03f2180fa1409a0fbafd1780eb4d26778f42f9501f14960a6. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QMPK41800077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd031418ac28bbeae9ba940e8180d8fa890bb1a5ee687c8a1876b2fe2d1110ed. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMPK41800078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2202c604925c66d0dcdc3a135d2789c25bf73b7ec9d3d494ce0574ddad740241. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QMPK41800080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4526e939d23cf24e031505d35d6d8bf82a366cfab04136edd5312379c3dbaf60. 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/QMPK41800081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968126c2bc006f49b6b16bea43fe819ab8d3ff8712d3a5a7f1baca5f088f3cda. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRZ131470010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e1e1d00b86ca0ea4c1031b4a752ca1ebee86e4833b273ed258681245c5aa0e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRZ131470020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3351df32382e6f392a26828a666591f52b08e97e1f12f771e80d21ace777902b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRZ131470030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050e3ea90c575cf8817a01622ce4856ed71d85b3be24035cf2f8ec66eac9d8f7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ131470040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56924c1df39ea8ac34efb39745c08532b39b231ba359623714a0a8c13207533d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ131470050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58b3b0cb36bfda22709dfedd0d830a79110887da30b2ee18c2f812c9552bde2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ131470060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd16691017bc398d8cf86cf89c2ad8f070a76a5c45ee117bd3f5e1bf59eb40b. 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/FRZ131470070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0461e960061187d2b00b81b92142ca47569e1ade1f5df889223d2d5935bf540. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRZ131470080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884344a49f88dd0d88d16fa2f1e4972d908f68e187c6f8c36c2dbebb187b49ec. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ131470090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e51c176ad6a1933edbeb19b8ed65519121f4360bb8f4dfeba5cca87152f88bd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRZ131470100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0200b80293e92f0fc8d94ff28b61fdebb2834d5a481c1265f6fa3216b32395. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ131470110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf6fdc0b281544e4274dc4ab42a004a61921e48581c0d6107ee5f0441ec13ba. 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/FR1F30400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4003c9255c8d78103d80c48c370f2f5ae1f09fdae7867c0e864f9b8c8606bf9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR1F30400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70b4693028af05423517eea8958a7daf774d5fa204930084e612b8f6a619e34. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR1F30400280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4054e8bc06ae3b419d32740634e7dcd3971e5c20a6fec10e5af324ec8f1a91d5. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FR1F30400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3e7825202980d7838e0005c65d0ff24e5689ca33d150f8c622c89728fb4e00. 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/FR1F30400240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0e98d4fecd1c07ce4a48adc8e3a097c78a6ab33e54b01a2812cf2cd0613b5c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR1F30400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a26f1bcec7e3096c9bd80c4906447fb82de5726858641503ae67ad65721d49b. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/FR1F30400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d71ef7688c55bde5c79781d26a2fc838f7e9b87600eed69926c7b6a85f124b1. 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/FR1F30400290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f20889ce95662e83f5f8968f4c82270b015158db9aa852d5dcf08746d89d886. 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/FR1F30400310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cecfd185ed374e58ac7343dd2120769f69b9a21e33685a96929571bffd2839. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR1F30400350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47412afab70c1d905fddcc3e2b8525ac0ea97985dbbc17e152aeaa085d3fe05b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR6DW2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b06c58eb6bb0ad401b279235770481713812d281d67c2dd0eb74f568411bf6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W12501090.