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 0x497c212ccffde8bab08296765388ebd0cce1fa733326ab693568f870d89b783d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4acbbac8-a74f-4ea6-9275-2cc825dc43a5.json and https://artists.proofprofile.net/proofs/artist/4acbbac8-a74f-4ea6-9275-2cc825dc43a5.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 0x2373064a1ca870824c559af6f3db1af57e5b088a9a1db2318e15fe36fa7c20e1. 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/PLP211700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbaa9e4c9f8e72275070965f1ff4dd264dd248e4db4e70e52dc0e6e7ea22a1e. 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/PLP211700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb889609286c197a2b1ec2dd7b7ff4703eb58f1bdd8d17215e4edc4bd4fcdfa7f. 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/PLP211700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74a44e64c85555a289d3a36153b4f736e00333e66227db760bec00a0e26a362. 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/PLP211700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd800a4710c30f96975988cb0635561a6fb119e95b0b9a0c82a882692f51c9d3. 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/PLP211700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bc46c0ed48d694e27804544881c76d1f3fd862d5111764554c831637a14d46. 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/PLP211700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a969b0a2c61bc3577a43c5db03818c4712df46a5cab9afd8925ccd1845f4d8d. 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/PLP211700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfc8efe7649ca9d72c771ff1686b4bfe62734f26d535099002c8fcfd00579f7. 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/PLP211700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062b677d138d3f9881a5fc2874b6bcf931da0695bdcf4fc744e67b20eeeccad4. 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/PLP211700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e29ae47f1ee0847a2958dc727e72bb66c4115cab9e7bb3c7145c1bfcbd5ef21. 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/PLP211700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb0cce360c692eacf0d68871b647745619b396128bc0d5fc5b42061d4999a1b. 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/PLP211700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07931a710476c8005b1a78bf2a4af524310176e7f0fa3c2757e6da1c8b7a38d8. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/UKRFZ1900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1010b2e6adc383743009896a6771cd585f9f41b3ac6a6c89e9ac2b554382f30. 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/UKRFZ1900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3f8ef390c8e96fcdee928468bb93bd7ccb103304992fae8fe4a82eec9c7bed. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GBPVV2002978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc15d40ef1d98ccfb9d9018d852b5141d5e49e2941bdab466a18c52978ec7d76. 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/GBPVV2002979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a49dd04e2273b88cdfafa2c6ffbd76be9f5931f06ad0125852678587f060eb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBPVV2002980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77626a7c2b622ebda78bcf7094cde3e5f500543f3a63dc2555506d98f3bdb8a3. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GBPVV2002981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16c57dc3ade79b565b6cf792901d5cdd8af68841f95da288120bce1b7779b02. 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/GBPVV2002983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41954e1b0e62df6f8244d7a96dc09b9c55c30e864298544f98098a119de8ef11. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/GBPVV2002985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8db17329488b925280c0491247dacec159f76686b577d9b4a12401a0fe291d8. 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/GBPVV2002986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb311e343b4f662bfae23156fd73858329d5580704a353471e3559ac1c9ddad1c. 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/GBPVV2004004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5777c5e504e978df8161228bc9ed173d44ec082427307ba54e1e19df2c01fdd. 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/GBPVV2204114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb311e343b4f662bfae23156fd73858329d5580704a353471e3559ac1c9ddad1c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBPVV2004004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe530752c96226c9d4cbca47b64aef268d31693fa4f5a6a77ba89eb9e0875cbaf. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBPVV2003956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd83a164447107db51cdb25d8510237898f3cfe3f862fc22498cd2c169be1391. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBPVV2204115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ddef30bf68da105843508e033747ab117bfe4a219114201d74544df61823f0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBPVV2204116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cab95bfe8e2f792f84040cbd04d1090d4570289916d17055185a15c1b714067. 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/GBPVV2300641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be41ae92af1aeb9dab136fe251af6e8623e699db5c449fb6798d22e13be74b2. 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/GBPVV2300706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d236d5ed2ed24c857333baf886f5309ef08dfee56c075c4abbcf368bcc71de. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/GBPVV2400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc553cce312c09393563d216647224b77aa1d7e942b670f1add47a80650c14a62. 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/PL2DY2300851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae7368e2e50a57ad3093c87c38ff73ee7d5d183e28cd3c012e561983bb7ba80. 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/PLB381900157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14372ca3a8ee8946769b6e42ea3bff2755dc074b8382302bd5c51517d0df778a. 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/PLUM72000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7168f841f1bde74e84096bf60f06e43c05a912bee4329eff97c6222aa5f6bd7. 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/PLA812300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14372ca3a8ee8946769b6e42ea3bff2755dc074b8382302bd5c51517d0df778a. 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/PLUM72000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28501d334b39c63ff5443af75b8cbc0618f997aaa557231d6a3c416384bb9f3d. 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/PLB382400862.