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 0xae6e026943befff3cc684c45659593f652c2a70150688eb080e47f1d5cb9b4a5. 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/702ea1f4-1db0-458f-acd0-18e82872fc75.json and https://artists.proofprofile.net/proofs/artist/702ea1f4-1db0-458f-acd0-18e82872fc75.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 0x969f5b96b9e80c5b018e446de7d3e39e125a6a042e6a45b61f09f94959780f16. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/NLD441800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442d58eb2a0e5ac22da7bd822132989c8954e20333c78646835d8c85a9b724bd. 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/NLD441800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966415f76510651c537d296624306e6e4a90c2f613e41a6a8830a8454ff9a0c3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLD441800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67157e96b7c2e203c7feae0a7b1d1b6199d07fb3e470d0d6e1b99015bbbfd2da. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/SEYOK1942114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da0d5719ce3c5e6e0ef49be765936dcf2cd04a3e817317886d1c03455dab772. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLD442000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6cfb8fd36f3d6618f1da354480195cdcc30af9e17a2a434d5e02fce8db9639. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SEYOK2134767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb732c4378ab89e066828468f939e159a1f5b714ee5b3b324c33d0828ca48f6. 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/NLD442400203.
Barely Alive! B-Sides & Oddities, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb732c4378ab89e066828468f939e159a1f5b714ee5b3b324c33d0828ca48f6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NLD442400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5f1c6932c45f5e48285112c9d90712929c7235ce3422b3e9680b8e93736464. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:41:07Z), 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/NLD442400207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2064083252c4439580d25abbfd1078f9188922ef0ab23652870a0960569ff84d. 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/NLD442400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ccbd949ef25bd033c80aebdb0f71481f99f42e492f7af1531adc5669f1c69a. 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/NLD442400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bffef949ce3129ec1f82d5f4dc6beeab3145882760efb61312c4b464bec1b0. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/NLD442400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a785376f21277b81f290ec2f347767d2bafa76b75b58074a6e7cacc273676e5. 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/NLD442400212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a52f291259a0dc85a92c649b3506361e57062fc4efd50affc5eb40e07902e98. 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/NLD442400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc2d2f05a41456321a822defbeb445e487eebf2a427adfd0621808f5d745a2c. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/NLD442400214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5c9667756609e9ed89ce266b4bd567a7429bf160c5bb7c4562cf75242dc8b2. 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/NLD442400215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9316569511d2f52813a211d9e57ae38f3f2bd10c83b1fe02966045ac8e20e4. 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/NLD442400216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d805c509431ccb2c5eeea7a1efd6ad7900d8fb3106049d2bbb3e560e2c14e28. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:59:53Z), 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/NLD442400217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440b212404420b98b489672fc206bbd03cf2908b4d924b7460b24755da7c47c9. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:05:55Z), 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/NLD442400218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461b7232ed60416a01da9586efbcdacfe371204219da753d1be66e4d4f987235. 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/NLD442400219.