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 0x53fb96d6e57dcf0122f0e66f9a08fd9fcd1547142dab1206fc1439bed9417d59. 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/e148e407-5ccd-48b9-ab40-fbd9891d5f75.json and https://artists.proofprofile.net/proofs/artist/e148e407-5ccd-48b9-ab40-fbd9891d5f75.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 0x50c273c89fcb00b5249fe21167bfe9e978c52d5925821579522e9cd1e8460451. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAFC2032856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d2505780bef344b9042adb37232108db5fafee4977b07b6e89243eedd1577a. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZNWS2037197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd20bc228d6d1db3cd19aa705ca864c7a0b5b01d196b40aef6862e1fcd23ddb. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAFL2174800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71a9e14ff7e31bf3e39848383df6074649b29c1401bd4baf78ac4e1c672e3e4. 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/TCAFO2182380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e012d277b34025e7560f777fdba1cab422d696c667c6983621b8f550f981193. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWZ2115714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e691e61f204b6ea821cc7397467f56588c2224d277432f16f7efdef1aeea96. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZTAT2181101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3e51bdf805b7c6f974f8785d1f43a0cce0c0cbdaff098ba75b8c69cfc2fc0e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZTAT2181102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e30136c070e8f89705c8e4cba4424a7fc2265a9a3c265b796bec0bec56f504. 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/QZES52216998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d72ea372bca29860ed78a6cacb9f6ee6f4aaee3b12bdfaaa870df4001904c8a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZHN82294159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fee859b8bd9bbfd8c75139421cdf4557a0128d2a1fb61b031f779340b99851. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZK6H2213137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac6ca62150b89a1a56d17485315f3a8aef7120c3146a85a1e95fd2168a6c507. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/QZTAU2276403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51570c536966dc02ad669a088873994af55280ac909f1b040274af7a2671f6c7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZTB52227440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edc3aa4e91bc0fbdc5ab3ebf269e1fe11d943a0091492b88dd768794a880ee4. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZFYY2334505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e2c134e11bf504b9219878df9f645a145d5766c7dfaf62f9f2a5c2e1be8fa1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAW2584304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd5c689551dbe193288141b3ec9ce00f769d2f9e95338452a93e2a0dc3e6d3b. 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/QZMEP2308703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a61ebc96a20300f0384d85a64c270b6cbe30319052b18c31c1c61c03a1fb3f. 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/QZMEP2323000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af11d21fa872a4c7a69892dfb3d8e3897bee4158f4a16dcb053925c6d580a58. 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/QZMEP2323001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519cb7d5d3fb4e3abef90ce2475b48b9db51cde66ff40db2af432d126097e041. 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/QZMEP2323002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5c590f9ad426eefc08d94e2814a04e91fed1d7a76787152a97b0fa9b67bbb0. 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/QZMEP2323003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcece1f0c16770187096f5e1935a6bd39e8b940ed93bfb402a47ccc8575733c2f. 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/QZWFE2321621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fd5fe3edfe2292e093e1c38c36783a5750cc4f9b1908cf2a5357c8945e4fda. 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/QZWFK2330469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa891c7333f62b27b71c8a1b0158ecb1a91376e21c68f707c555622fadb4d69. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZWFP2314932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3a2f4068559ed79a105de61b3376dfca15f1e5282bd2bd3b48602ba42338a1. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZFZ32403313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff0ac672e344ebe618799b3db0e6585f196f45336c64ac5bf55d0bda0e282d9. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/QZDA62485569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8243bcf20062a87fec7eba8deb5f935db7fdaaf84353b0ce0f8aa68848c3919d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZDA82439689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86449aae8831385e21b02a28ad2c9d88680001e2a339d55fb0c7f887f7911d36. 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/QZHN32471552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34f3485e0ebc1cd56a774e108a495583b7b4c279df2ca3a2837ffca8410e0d8. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/QZK6M2473994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d03c878040158c10a50d56a2612db0dac74494fa0f0823101a4fff4c260c90. 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/QZK6F2446079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8347b724a6eb3614edbaba2440aee8e9a66c8a08a7aaa5da6efc6ec7e23489. 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/QZNWS2475839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1166c3c1aa96fab7f150a7b59c8867b459caa33906b2ca604ded3a7a4e888802. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZTAW2581243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50d2c9866a65d6bd8253c2119429bfe853938109f8263c18ddae97d5328d2d3. 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/QZZ7P2492747.