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 0x567416dc1b899cdc5b2e4341a2eed372dc5e13a4b4ecbab6e803f5f7b197add6. 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/7bbd12d2-eb7f-4c0f-98cb-8bea7979c59f.json and https://artists.proofprofile.net/proofs/artist/7bbd12d2-eb7f-4c0f-98cb-8bea7979c59f.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 0x13d007da078c96defe35d9ce257010249f5ec536acfe2044820eb633b9ed9a56. 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/GBMJG1707777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8154321475fe7c872db867d0cc060ea5fa3ee3240f9628c1a3c7bad3565fe88e. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/GBMJG1707780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bc2ed5873ac2729abbea48dccdf6c33382f76794b0d660c370afb3149f5dfa. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/GBMJG1707762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b454e47243dd08f0e4e1e62095542ce7ee45e8bc5791df3518b060bc5d79ce. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBMJG1707765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2288d80b6e05e10441f5482b6c2095f9ab0c209b6282304e05aefb71c231f657. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GBMJG1707768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dfc43b825d4a973942a837e28a874d9f432cf2aa75c14a57818791bac00732. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/GBMJG1707769.
When I Was Angus Young - Instrumental Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb458c41709a0cfb675f96d12ac7145e9eb286d97ac8d49eea5b774fd75961f5. 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/GBMJG1707773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e59d5f3df6061aa242a0f239b32ff1998efe479e7e23ce820eb2c157c54cb1. 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/GBMJG1707775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc8f3e66b699f2cbf3ec54b7df41f073a137f00711d484bbba77506d0a81e51. 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/GBMJG1707748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099938b7e6537b4b80488e53f197f69115dd0f50e4717514938e726f6cc9dabf. 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/GBMJG1707749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc283cfe0141b5519971233271a0651192d112eaca46718bbaab80021616c71e. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/GBMJG1707750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1889261e489c69168baedde2626408dcd5264e9d68e592681ffbfca1f2254a. 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/GBMJG1707751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23001ab15f7c9827222d19fbc257de51925f3bc28cfd9698798c642d3c49446. 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/GBMJG1707752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85867e2cb718ad526d11f16154ae5118d02ae482c377b7d7dce9df500fb2a39a. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/GBMJG1707754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6f507e3b403fd2790b7c9da03e3da3cd24902afc7a922b8aa72d9774b9a405. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBMJG1707755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c993b62d961b03005ae8ad822cf940583cd29cde2d8dc653078fe469d45dc7. 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/GBMJG1707757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb8207386198d6ff037c39f3b9a0fd6adfcd44a7a0f1be3d67862842cb5486f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GBMJG1707758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53be23f5d9a47d46704b67cb31aee9a9cda27d2bd85655681f67cd0497d9ffa9. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/GBMJG1707760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fa6e6c50be3cfeb511eb20c96a10ec33253284ef3eed8516b376030d5cc2e5. 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/GBMJG1707761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f67fb9eb1dc4c5b831067a5e729efad25eb471cea69f42eb649e9375d45abf. 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/GBMJG1806059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0e73b52d925b2b8182ec5c65b9bebb091342493483752ae7ce3b47331cf7f8. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/GBMJG1806060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c87fd1f6aea6c239fb72827d01f11f686d9d8f661d216ae5418637f62579dff. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/GBMJG1806061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1307da5a25e996f6a42d9a1de786f7f1e078ae78b9c1fa174c35508a1f0d9d39. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/GBMJG1806062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869a8a4eb62d6e006602173efef588de14d139fbe6199f23f49a597a896bb99c. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/GBMJG1806064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d6cbcca479ca724cad42590591a644de1f9ec94e0d644d56bf4fdbe78bc612. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/GBMJG1806065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2633c63baa6a6ead1d5a8582670d470de26b59559628a2e0fcc1cd99b4ea85c. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/GBMJG1806067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb16cc5a0ed605f367002b6f6240cff720a5a1166b15f2bbb9ad01683de2d539. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBMJG1806070.