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 0x40d720e678d498a4864182aded26364ac8a1c11c6c6806d50df7e5b83634f475. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/faeb9572-97bc-431c-b1a6-e4db084f2a3d.json and https://artists.proofprofile.net/proofs/artist/faeb9572-97bc-431c-b1a6-e4db084f2a3d.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 0x56431d4cb14949ca4252f3ec2b1a708e2033503ec1724fdb4ceeb30f03cecb24. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAIY2455640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbb17b4bf529602896e9d38c99eaff03125aea3f751178fb9d626a10482f95d. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAIZ2455504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa39dc36ec3ee7a1bc6aadd870d392ffbb258d8c55d0cdc000fe679337daf011. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAIZ2400852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e92c069f77052df6d66e19bb606a216bf133a2d39f4364af440c9a458d9718. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAIZ2401076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02055908e85464703b6aaaebcf87b292e518d9339258b8785d895098c5c55002. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAIZ2400988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c22ec74763074fc9c22b9db8fb2b7b6808760e3aeaf99e095f96628d0cc857c. 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/TCAIZ2400811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae1ca7eac003fb45966ffa3d55bb3fb42fea36f334d513df40996f3f1e46ddf. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCAIZ2406370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9795ca399ef0f6e1024fb14a9d980af699e9410c07089e68ba1e1a0f2a20372c. 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/TCAIZ2406342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c279888f2da493afc79bf8d105810163347a32e470c6809ddadf42a4a19d0e4. 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/TCAIZ2406399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d33314fc96ab2f7ef0c7e764757e566b50acca664f9f69266929bb77e141b5a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAIZ2421180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e17cfed6abedfd463df7d105e848ac4db43b05905c1db916d544979c76e09fd. 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/TCAIZ2421313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aaff5b2d5aee0a92236f65f6f8523e77a3f954c4a02d5938549e88daf5cdb7d. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/TCAIZ2451320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39741c88cd1e71e2c8cb0daf8fad35edfa3b8fa1c3b256afe3940bc089b536fc. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAJA2454890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f68a6b96fea8e6fb967df0d7415cdb70a645303982be2ac7614621589672573. 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/TCAIZ2466308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58edb31e122002b4b9e19fc0c28ddfb3b0385cb79c6a5ee54c034be6cfe9695d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAIZ2466188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad306308040214d284219952433cc846fca20c29df3965b42594941c98cdd7b. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAIZ2435663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5362fa4194e26cd74db7989adb206971ac685ee5217cf846c48c375ec8962f49. 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/TCAJA2435806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb187968864d9cf4c352b483feb7c9fa73175cb803b7c0249e5aab8f6b6fdf65b. 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/TCAJA2435878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6e9a67c474003a8e207518d03d4bfc4cd72e93a52cd63bb24cb4eb6becbe35. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/TCAJB2435784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f80b736f581b441a391437a3ddd46a0df20bc8cbd4ea94d606c3d8766ac810. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAJA2479131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06db25e013ec8fea69e9fdf827ec2c3cdab16869e7912a65f1ada7380f40215b. 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/TCAJA2479164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363e7867a90f1e434c54ac80a0702727b656bc5cadc75c751f02dbe3ba96e5d3. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAJA2495885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea011d9bf10c68b4799c52500cf8b6da8471a207b46fd43b9f5efeb5f8935443. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAJB2444815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7231f0380b2e1b0583fee8cfe957347159739fb4cc5fd3fdf28cce7067e1b8. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TCAJB2444858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bb4bc345c97c2f01d51e9c13f21baa6c3287c331a183240dd7395f96debd8a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAJC2454682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace10e191f881b9082f1069b521ea364834bb52a303ea73de56259cedff429d5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAJB2454454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc6123182156d2d43e4accaa29e573a817b63a3fffe29727081be094e27ade0. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCAJC2455109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e26a55fbcd2dae0f7b161ff919b7b916777a8bd040d322783c744951f78c382. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAJC2428830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4543a474ac081fdb965866ae7034e77308c164a7962471b02e51c5d835ed15d. 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/TCAJC2428879.