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 0x9a8bb026666f7ae47c64c070f2bb9b6b9bdc206c3f2eb0bfe9f66bfbc771c1dd. 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/d51e14f0-ad66-45f3-9d02-1cd3ea231350.json and https://artists.proofprofile.net/proofs/artist/d51e14f0-ad66-45f3-9d02-1cd3ea231350.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 0xceadf3abf6c722412b791764f6c32ee7ebc468939d86414e000904d9598a5ef9. 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/GB7YL2000126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2e88df0ff8b1e46112a5f6f1ea7d67fd1a7200d8c3a0da1be27dac0b07a078. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GB7YL2000127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd8b69b0122fc838efae293d723afd3ac40bdbee0184bca62bccda939bbd419. 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/GB7YL2100162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f7c4a962b89f7e3a81b18f42c7acaa23e82bcdf1328fa26c809acda3e59995. 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/GB7YL2100163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb56ffab2fb0d6c30b680b6ad1c8d4644f87d5f2dc45aca6b22f782aac593be5. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GB7YL2100165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41225641c68aff1ad24926c190b01187a09a06b40bf0f92bdf16e36fd5e13825. 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/QZFYY2452623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868ace14bc639c398804da48bab75a46518515a16c8ec21beb66987eb958d5cc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CA5KR2435553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5adce08eb44ba280e039e849bf18f54fe11f48e5416766122cf4568601ac43. 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/CA5KR2445985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a8ead2645a433151a2a8de84a20e0d23a8175f5de6aea56e4142405239d9b2. 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/CA5KR2467132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f95c1179c72ee067d4bd139172e4f1231e29f74b065e76e7735e79b5585448. 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/CA5KR2467133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5adce08eb44ba280e039e849bf18f54fe11f48e5416766122cf4568601ac43. 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/CA5KR2445985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40264eb777c5d54af72999c4414c5dbb22518abafb42f9b43ee72ed21ff43b33. 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/CA5KR2458438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155879bf6b7a6d72ea031e728fb90c7a3d583f4cc75233d93e33f54cae8390cb. 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/CA5KR2467134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868ace14bc639c398804da48bab75a46518515a16c8ec21beb66987eb958d5cc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2435553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5749b794441ee74d94f3d79ae567139b0004eac600710ea6ef836b46b55b77c2. 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/CA5KR2467135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed3d792a2b614453bfaaf1ba77dd339508806f35171a022bfd60d59553e8cac. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2467136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e4a5ac3c97f59bd9e0e1e852ccd0c80073c222e4c17a85773c9178871db73b. 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/CA5KR2467137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cfab8db4b53f86282735dfbc07832e211afc45a1b20aa9174e45a07e6112c5. 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/CA5KR2467138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b827afd95536c5d9caa62d10ea44c0032158a51d43a1779254667692bd5da71. 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/GBWUL1944035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfc6dfa6a6c6d93b9ee42981869662fea31c19deaab175e7f45ece4ad1e5996. 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/QZMHM2080314.