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 0xd41ff55161bae4b423824d07594e4fd4fd31d2bdbda2b6ee31d492ca49ebfabe. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dadbce1e-9f3f-47e7-901c-55d738119e8c.json and https://artists.proofprofile.net/proofs/artist/dadbce1e-9f3f-47e7-901c-55d738119e8c.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 0x56f9bec86ebd04ff168a1491ac03ec39a97e075724bd28bfd1109e3f39801999. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/BX2YY2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4826a2d629e96acaa31301ac0eed9e392dbc1655a02fcd59d08b81c1197279. 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/BX2YY2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1796da5320214dd71c7e626b55fb4e9c0e01ce24163ce1078f96b1723765bed1. 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/BX2YY2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050ce25c6eefe40c170b878cf3f5f2ba434d980e4a152249ac49655603177999. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/BX2YY2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17939f29f8f2e742249b2f0e2da766aa4485ea5b5a054ebedec88577db094786. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BX2YY2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4692322f96d206918cdcffd22cfaf18ed94684eb0325f857dbd0388bacaa7aae. 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/BX2YY2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f0387e233133afd4b4e204e408a21ebfb3896e09de26701f7ce0614c8298ec. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BX2YY2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb044a8b920e75f583086f67388d0b9f83f51dc5dbdb55ff4fe638cfc94d17e0. 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/BX2YY2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4d19b1ceddeb88166fbb9a1b5b5c50d1658fe1074d25a9bcea9954e13a270f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BX2YY2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2dc470c13fa6a5bc5ef9ce53d4052f5826bafd896e502e21f800d612607a8e. 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/BX2YY2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb231b80ec14accf7c44a6b0ad14fc747b01f08af6141645a33a23fe5b5d610f3. 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/BX2YY2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a87a803b7bacbf514457597e3ad339969e8bf0fc6ddde18835e127092f4a20e. 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/BX2YY2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a164064b107af03c6a6347aa66e67e7bd2883921b4677e6513c28efe58a8bf7. 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/BX2YY2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aabe22cf8edd6c0647f2091ec21286e63760cc13d672c19dd6821e806638186. 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/BXTZN1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491ce8009dd6800a0ac669da1da2ebfd05a4657da632e168f331631bbbbda94b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BXTZN1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7803431423cf324b0939f76c786390d2da4fcb6b6d034e47336324e567a5d420. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/BXTZN1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b84eb901a916c9a278e5ec2bc076b7101e92f51caa83d6ae507ee86b237911. 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/BXTZN1700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6076cf40c0995694c4f427a582b7e6e55b85fad0cb96b2a31dc4536dae1b3e4e. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/BXTZN1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf564129e0f5eb206786d560c1b87697021b5f5d8694b72fed20bc0bc49679fc9. 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/BXTZN1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc36be485d0993265b79c260a2360b369675da0e7fdd6cc3e6e2bea349e35e1e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BXTZN1700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883a9bfbcb3b619c9bfc78d2249694f2eaa3645a62d341d2326f1d1aef169e07. 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/BXTZN1700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bd48fe61b1f7379af945a63a6d5f1474342e4c2cbd646969bdabad5853662b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BXTZN1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75fcb9ce05da654c3ad5abd010a21684b93d63ed808359594bc95061a423bf7. 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/BXTZN1700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5969688e5e619fb7614e5a58dbf80450851366a31c7a82b41c532e04fa02f42d. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/BXTZN1700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc08bedd98e586df569dc3ece2c31877cbe569053e7c95bf78df087afaef2e6. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BKP5A2400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068996205850246a48eb47384468b36ae4a8f045e432d6781c12b4085212fc3e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BKP5A2400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7213692b5dc4cc28c4505644c0c6babe68911f2c76eb9cfaf517eff88a10683e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BKP5A2400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d76d420f9804ca33e8e651a72dfe7fa2b93f102be3fe500286a5cf7430986a5. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/BKP5A2400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfd128bc845ca0a8cc4a425c0aa24cbdf4aa1a0168e80e377b36274880b1b0f. 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/BKP5A2400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc08bedd98e586df569dc3ece2c31877cbe569053e7c95bf78df087afaef2e6. 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/BKP5A2400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f6d5a03a5584e3cf6412f00fc5d353a50dfe09371532233b0d91a8caf7bda6. 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/BKP5A2400160.