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 0x223b2a09d807a56531c165420ec92dafc8ac3a8c5ac39fcc7c845602f1153e38. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f2a4a84-7222-4f71-b938-6439f75ef05e.json and https://artists.proofprofile.net/proofs/artist/6f2a4a84-7222-4f71-b938-6439f75ef05e.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 0x61a5a6f8e24bc10067af829aa0969794b0e61da41e16e928aa748ad8395027f4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/UST8K1620918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa336bd702585727c9b47fc33ff28e97bfa650ba7ede57a9a3220a711a4c24260. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/UST8K1620919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a8517ae45ec0a50da4edf97a7daafb95f2c0671e7dd0e2b654265e0f8b6da9. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/UST8K1620920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a26fea13fecdd2a77c13cca1ca0850c93ec771a95d9d678c2d37959bb692150. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UST8K1620921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc808401ebd97074f33cdb4c3b33f71c3256c1cf467d34f1672c6a4367f5652e6. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/UST8K1620922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38ee5475513eefd9f95f672b2763152d75d9a75ec1a2af39076ce4a1acb0a2c. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/UST8K1620923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5528120554d691e7897a4741d30c31486c29e2d2cfbb5bf4f28ea39ccb2876. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/UST8K1620924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16f6cf1116ad1dd483b1b8eb778d3bc4e21abf290f522fe21529f27e60db30f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UST8K1620925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4063ba46f3d4f0b3fa899b639b1f94b140ecfd01cb5bb8341e56b69cf3bbaf1f. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/UST8K1620926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d8cf46528465e9af8b91c88076a5fda9ec975434a3e7d2d1923fe5041085e3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/UST8K1620927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d52d7ebc2e9b78159a9c98bc50750b179e9f3b6625fb6dc85597ab2c00f35be. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UST8K1620928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db255ec78681a34bff094aaf633837654453bc7478179e250923b352f72488e. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/UST8K1620929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf561f128f4a97544c2711e636f711200deec3608866a133c9ba6ab2d947bd9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UST8K1620930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe269715dd402aca3dd11548e344643682feb0b12aa746a631779b64da6624b. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/UST8K1620931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73fd8eda8e6e1e81ae790913d52c3c8bfaadf276021536af2e8561d19e13d83. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUOB10300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2edf32cb68e77d9b3345a26fd885d1c2bcac4e44c24cd8fc67967d3bfe7ad7e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/AUOB10300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1262f50a1881bd7ef354b9e680abd13fdde16684aeeb82efc30008d9b5abe929. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/AUOB10300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907953460169e9bd53e75afbac6e9f16fca07545f8640a3e3d213993eac30e69. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUOB10300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ecd576471ecc1bed4fd836266b4e4b354308158c594381609a284cb32fa747. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/AUOB10300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ded39b23f30f060cced9676e64db393559f87a5a28f7bd874ee1a171149645. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/AUOB10300214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5135fb17e0cbec39a5ccec86096aacf60133095f4ce555add4d5280fc640bde1. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/AUOB10300215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f1b9a80be2f2c864f37b529bf7636c56f10f6637c416530bc51446d509a214. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/AUOB10300216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7d343507a1287cde6c6c49c9bbe3c3d69c9e47ff5aa0fbf40df5996b90495d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUOB10300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d806ee5de8aac4fd5c5e5dd1f4eb3e21bce6f9f45b29a5b163ca4a7bd2823f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUOB10300219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12355355dbf25a2cd22e651c390b59abc6dfbfe53125784913057e12676411b6. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/AUOB10300220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1e44fa0735f76c105e7103bde51309b26e23eb9def4169d4e40fe7c1d673b0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/AUOB10300222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1399736e76083c052c75c471f05b3bcb8eaef0c8f80a41b7a2f4e72daea38b3b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUOB10300227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b910f223644c224af4121f21ead0e7206bb77b5695ab8b22201dafe16054140. 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/UST8K1620542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e06d62043d0a71e2d176dc7ed46cf31c583a3673df5076f04d9f6047aa0559. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/UST8K1620543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91462d01bcc84be140a46ef4270eb1c91f420631f221166a56280734080693f. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/UST8K1620544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaccdcf9561340856799aaaedad302ce97a4fecfe949d82af8c82d2d58ac276. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/UST8K1620545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cae7f3139816833fbf682d63dda1c3e72b9a906e28faada42a3b048641c2a50. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UST8K1620546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba87aadbf5e961ecf98d01828c4a89b77bf3bbbc0d6bf151dbb14497bdbb9f7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UST8K1620547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc6cc5ab2f2913a1f88c32bec09640b2854d8650c5df78884d4203ca466aee4. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/UST8K1620548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb317d42708df973e0ba80fce700e50564d52e1fa6d7c55de45ff0874d51046d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/UST8K1620549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6e0124f613bca25d393f09699dfc16da49555ee05f6dcd0dc09d39ed62ad46. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UST8K1620550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb0ced90268781c4fa9cbd5b09af0a24fb8ee3beefec0d0a2bb1b033eac925c. 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/UST8K1620554.