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 0x2d5f422fd5880a4318fca202827e9430214ac08b22fa8d98e0aaa77a455cdb0d. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62acd93b-e63e-4bd1-a648-0ee428853691.json and https://artists.proofprofile.net/proofs/artist/62acd93b-e63e-4bd1-a648-0ee428853691.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 0x64a4a96dc5f38f45b9186434595727d7cbd96856aa1905e918dd263a69f46781. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZEC2458878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6172ec8bb034d6e31f3ba23bd835501a5ac23050eb726f3832832be737c00fbd. 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/QZ5AB2454278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6122613abf8fdb5b1c1c6ce882eb5a420b915d104680466b9a15ccf37ca32772. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBRKQ2218695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe054956ecccd935b1666519501506576aece63395425ab8fab7d15dd46b98aed. 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/USLZJ2212126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4ee19d252b8a70b0789977113d4ce2953f7235aeb542d39590943a36ece821. 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/QZFYX2159024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e9d740ce1d4d39077e0accbfabadc6b34f60965bc4805e5754d816d76efb53. 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/QZ5FN2200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ed1d53fd8e60b13bbb803114d2cdcb82cf6df35c2542adf6ac28ce9c19b7e5. 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/TCAFY2119147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0ae27dd91b4337db1aa1fe105bc68c40ed5ce305ccefb409efa8d16da17533. 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/USLZJ2203113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d395714fd8b63ac74c38c3f8b46cb6a0e8d8fd38513f9b8b34fda0f5fc5731. 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/QZES52106136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfadd9bfead6157a45c5d6e2f0479dc6315ed45a019d9294916203c90ac7ab6b. 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/USLZJ2212198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130b94da9aec1b454080a04c3c94bff2ae8479dd142aba91bacd58b47d0e06f3. 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/QZ5FN2214393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc610f61efd19767da9c355e42b4f656738549c1304e6f1f91d3d5d7346d7f890. 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/QZWDE2373805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b61b2a4c79090d54debbfbc2a136cc093778ec103761ae33260b8ed80436ab. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZTV32351438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae5dafdb66a9b6a556072c4977923321538f4a2c04f838eac5e1997e4d128fd. 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/GBRKQ2215153.