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 0xcf68423f8fa8d1892fd5edf4529f423759ec0515311d299dd37d09400704e3ae. 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/c46a2995-9af0-4efb-93d1-2b1c833d5143.json and https://artists.proofprofile.net/proofs/artist/c46a2995-9af0-4efb-93d1-2b1c833d5143.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 0x97bd7c11079d53012c3b9369b774eea588ab8a5d6e24db396c4cf51040d0dea3. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/GB5EA1502640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5833ba452efa7f6591640fbe4272c6abe49ff674f3b2b8059ffa5a7ac98c5aca. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GB5EA1700633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5865a0f0fccae2ce1febcaf9c5210608fab51db415f538f889544a72e6596a1d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:34:15Z), 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/GB5EA1700636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d42cf4e1b2b4d6cc02eaa98a1f7973963aaefb2a2fa8deedf22a2e191389e0e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:50:33Z), 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/GB5EA1700637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed8a13a5cd98d0b4a814e9ae4bbbf8c79251392b546053751a78dd2e29946d7. 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/GB5EA1700638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3fd08a9ca612742c818004067c3a86f8233e04dcf48ee5b8c9c33670992e4b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GB5EA1700639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d376601ed031c855e04eb1f740c8c8ef448ec9b592f881bb9fdb94f678e9f52. 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/NOLP71801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d384aedfdfaf9d0dd5293e5c3fdd95e12da60ece5f91e0039b8408a5a29b24. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NOB1O1805010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8772cbf1c09c44e7bde9705bceea4c32e044ba5625d8cd59b3b85460db00aad5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:05:24Z), 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/NOLP71901104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1f46fa170f1183c146b6cf0a2cb69ffb25021e5ff7c027d82661cd7bc6ea00. 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/NOLP71901105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994093d14ae0cf517b6631fa16e645647e8e3fcf3df8f26718567126655f0a47. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/NOLP71901107.
Immortal Space Pirate 2: The Last Shredi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8900b57e0e9f7a31218048be554d2845672157a8e0de95f2938e994c7e85d9b. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/NOLP71901108.
Last Night (Was a Real Massacre)[Live at the BBC] [Live At The BBC]
Last Night (Was A Real Massacre) [Live At The BBC]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5ac184e4ab1f3bc1b34be96da6923f97828cb7e5ca13e5896634733fd80920. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/NOLP72100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc914a3c7f1358984a244d2befb156d08bc21ebdc9be56d11d8cc73c381d349fa. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/NOLP72100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf22ad8484c4144de873a8c7595f04e797087f1ada4023456f1e0d20e0f9523e. 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/NOLP72100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc2c223da207787b1fd688b56f5713f9f11728c1a202053a80614905b352762. 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/NOLP72100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c89fdacb22feca93e374d34379e1ffd81a5f80498435314683e24d4c0a10cfa. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/NOLP72100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8bf6e47eed9f931ff657885993bbb3daab549a8cfb6c3004aee1accce98f0f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NOLP72100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89806e4c53e7413ac976655e4115f0f0c3072dd77ce532a2f74fdfec8b9b127f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:24:56Z), 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/NOLP72100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0131ab7516801566a4d2bce49a3103ad8ca763d80d673d40a68ff20b64156dd9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NOLP72100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2414f926b5887b13895b06264db128a5f5065d8c85562bb21d7b9ecd21d13be. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QM6P42361121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f10a0d6021a4685924a29c91413c5aec31250e2af784d32e47e408de7f0719. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/NOCVC2371050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a58bbaf817953211724571d4ad564023f0d611a2a10c19d2e9fe9803012b0e8. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:56:37Z), 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/NOCVC2371070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf0cb5cafb149b2ad49fa6bd650011e1d40453cd1f6e71a92873244a8aeff87. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/NOCVC2371080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5810e2cb562fec3f4a5fc584e1ab88ca6b08c2d8a8b7d10f3655c18409f56e3d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/NOCVC2371090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093b9ffc4c4a46c17fc0f923fab3e35f8bb084ef260c26464e2a67e0d40c3e00. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NOCVC2371100.