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 0xfbcc465b68c4014f06264471e4e7f112034bd9f184cf3825942d3c8db3496529. 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/84abc04c-7023-41fd-b00f-decdd7fec68d.json and https://artists.proofprofile.net/proofs/artist/84abc04c-7023-41fd-b00f-decdd7fec68d.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 0x514975b44afccb84bf7e74e9cf3902763c26be1bac8a74657711351be8b409bc. 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/PLUM71100737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d705549b536a32ac713c4539414771f2363130cc4b2d13111eb4381ca4402c6. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/PLUM71100739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e47af9b1ab8985948e68f047324fe4f19a80d10d017fe23d7cfc5c267df5db. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/PLUM71100741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ad32e5e287e10c8681098a532f5cfc6f61d98069215af009de9d4291292621. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/PLUM71301184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c743f7f625b6765ecdbee468373aeec4da4a421d44932acc2b61c830f4d269. 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/PLUM71301185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991f98379c20d47c71cacff1f7ff90c78b27ed8f8886771ef26aac23397f2fd6. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/PLUM71301187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7b3040498f0b17e19f855fdf506d833edd94c79e40734edf38808142c79517. 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/PLUM71301188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15169807006c133ce83c690e73d21f0f0c578223fc78a5bdfea94ad5cb49144. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLUM71500540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8122a42843075135d7c40da939ec803ec53e4274d784e81504314fe7dee399. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/PLUM71500541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c61884f874554f5b6098e67b0938b93b4e38fcbe48facda9216462c6d346c07. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLUM71500542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bce3b1be82b63e67d9c3c1567ba8214b3607029f72adbbc3b72cfa67e139d5. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/PLUM71500545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b6283c9cef7a6379e20e95df070ee1e0eb072a456fee0302fc0497356ee895. 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/PLUM71500546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44b63da3d68c877f698e0ad9ed055832463c3f8f91a50c57b27a49c239824e8. 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/PLUM71500548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49d557747d985655734fc53bf0547066430fa751c9ea7a43898935d66385de3. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/PLUM71500549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e8f6782deb98df590ea055f2a648b4f8e7e94a18056bfc35790df3e2b4cc0e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/PLUM71500550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b958da986ae62aacb939d058ae3a2b8f4e75375c68bc56e2a61ef33ca86c63. 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/PLUM71500552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51afa859d334ca5cd51175561e1331cd8c17e7d35d76563898e57590d8919c62. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/PLUM71500553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9c3d894fc56a7412c0bfdbb51a10f83a6f2498c635ebb903b8d91f1764edbf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLW211800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc60313875dbf4424c0e36454b1d90fd109cd321d7319926aa34c5c6d3354c15. 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/PLW211900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab88c3ee29d9933dfb9e9f427857544259409ad8cb8b1a15e6143242765e66b2. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/PLW211700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37eeb686f087faebbadb78aa6836a36732cf9f99a314c31a4a549cfc72baae47. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/PLW211900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3f671fae5b4c5eb96c861c75bf175fa3f54d856989fbfc45184212bcb1eeee. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/PLW211900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9ca2da29f49ebbdfbf5862a2f395fd8a4075b198b2669dba99092b8d0779c0. 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/PLW211900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b19de43f3f4d64343adbc5405a0a282f348dfb871917c31a01249e6b8e1d63f. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/PLW211900011.