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 0x81b9d08e63ea796f4125a604c20e3849409a08f513e6370bbb20179a929a7336. 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/6cf2acb3-7d4e-4d1c-9b82-60c31019b4aa.json and https://artists.proofprofile.net/proofs/artist/6cf2acb3-7d4e-4d1c-9b82-60c31019b4aa.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 0x00d764be3d2c30b3f0e9fdd28e22ec2df80ed77d4ece19ec6cabc7ffb58b068d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBCQV1300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a4c4213925cf0b764ada3e87d083d1f6bc2e1c7f3ed2c6425e2931f2e7f6b8. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/GBCQV1300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2049254189573ccaba8bf7fd8b8cd8372a92d2161ba77c09b61cb7df4b1c07b1. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/GBCQV1300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b5be30ffca272ec2bbe831deec3c87061475c5a51a8d231004abf7f49662ad. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/GBCQV1300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59770dfcc85511ea30475395cd79871b2af9711520f7d6fb3000048eb516a87. 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/GBCQV1300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8349f8bbd327b88473da5039b844d7d8834ae2e484908d692400989464ee8e9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBCQV1300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb434d97de935587e445af531589995186227f64bd85439c60faba63d5331bfd8. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GBCQV1500373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e2d3f86a9830aee4b79fde574c47d75fa42fa765f5c7cd4649c0480143dae1. 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/GBCQV1500374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5063218752c3c6841bd4f4d5e574304b879fdda2bdd1ad09bdb943d491bd0c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/GBCQV1500380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c113d2535c9a076729ae90fe6e34ffe4449df2d9a1c56f98c0a2185a5fb12e. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/GBCQV1900250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcead5b88bf6654cd55a61df88556e8c5eb810fa7c1f13292799e7426cac17956. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBCQV1900252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa730ade79f21a113766c879da54b1bf9f97d2b62ac1716fb3d979dc4b93078ab. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBCQV1900254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad70bcf77c77b9aade5cf1c825b6f3567db8dc32aa8f94f295790dffe5b8fe98. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/GBCQV2300327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a20fbe0b2d2aded0fa0ba1ed5cab8186891eacc739e6e213826f1f178d0c4be. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBCQV2300328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3154b5f4dbed4de35bb5b817dca87af83c48a6ad455bd6d3650d961329555870. 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/GBCQV2300329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c3eb2ac19f2a26495fca598d4795b5e89f58409d9545174bc1544ff353ebb4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBCQV2300331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288d733447673a1e303a112980f743e3222355543bf264178622404b3f9f8c6f. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GBCQV2300333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb59c7bb7a9e3411d2353e7debbac063b1cb204ea24cace317bb6d2e58df328. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/GBCQV2300334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee4a58c0a1c203445fa78687b35317a2788a7aa0499674becb2bd7797fee14e. 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/GBCQV2300335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bb5a4980ad213e3c9eaee75f82eac120c27056e64f40ec6dfb40e4bb791ce6. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBCQV2300336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bc1716fa63c87145f7852ce84f4202c9413066bee37a0da87e6973180e2b10. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/GBCQV2300337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d399a1941076d7ee05b6fd05158be3c2824c3edb73854e4860de7c53e27af8. 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/GBCQV1910395.