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 0xa6415622051dcfab7153759fd45d39c79bd74b8fcbda18b3b4ad9cb59784bab2. 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/aecc5d8d-bce9-4972-a398-d0f71d169d65.json and https://artists.proofprofile.net/proofs/artist/aecc5d8d-bce9-4972-a398-d0f71d169d65.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 0x6e6a6fb0bb176f7c4bc7d51aeb4c7bc463a006ebeabb9643c13e1aa332feab1f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ZAS370900155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89030923adba50f3faa1329901df131ad13bbf746c8a9b2e086b6900e9ddd173. 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/ZAS371100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3f5acc3360e04ab9cfd81f2154d80b1d4f2435a444dc299a755f73be703e5a. 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/ZAS371000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2e5f26eb10897ef4a0014af86f813fe248b9bf582fe7ccdc75f19251835e8e. 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/ZAS370900158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1e464e9a8ef03df837e66228948ecd7cd6b91bbfb07e31d347d373d798b921. 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/ZAS371000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba5f7614bb4bab5ac32874f882a7ec572280e5c94f54fdc93bed6295b7ca712. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/ZAS370900160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c571c4b73ce8e96894920a8f7c9902ba86760b8b203fc4a7c4d51af462ee81. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ZAS371100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bcac8055bbd1b36161460fbf8db92d97297721c72d78f78b45470c165a6d23. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ZAS371100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af8edfb48f93f907cf057990d67303c3a799dd4e744f49f83f8a44609ec2674. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:01:39Z), 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/ZAS371100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cece591d15283d843d87559c321cbc422e97974424fa1718c51954e72a4b4a8. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ZAS370900163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7f77d334a3f8ac84e23afa6af8bf8c442f2c11d47bdcf674bcf79f112ee6b1. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ZAS371000165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8633b1e0a1825b7767fbb78151b71d453a30ce72b587d973fb9bd1520e38099. 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/ZAS370900161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6a6fb0bb176f7c4bc7d51aeb4c7bc463a006ebeabb9643c13e1aa332feab1f. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/ZAS370900155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7eea3a7f763af3aff094a983f3edf8d67a36569e069902254776d5ea1bbda1. 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/ZAS370900156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e29d49baee8d63274c744aeedfde6f2da894b84c14e93672ce79ea20e96485. 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/ZAS370900159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2e2dc3b69300609b1088899a155f8886c3c06731c858a3f02e42f99325d9ac. 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/ZAS370900162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b5faeeed56abcc71b1427f6bf07f98ada820d8e9c317a95ca9b181e9ebf5fd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ZAS370900164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6f14c502c47c5d8fd0e7ad11c2a8c4472cfcd937d52a2c81e91e0155b8a34a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ZAS371000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abf75cdc0326e0ee4e497aea30d7e5b2860624cd470a072909bd85c352c9e88. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:35:31Z), 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/ZAS371000161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1e464e9a8ef03df837e66228948ecd7cd6b91bbfb07e31d347d373d798b921. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ZAS371000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de3186eecc2cfd2cafa014622032f10e84fd666280ea81c3f5909c7649b3c6a. 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/ZAS371000163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a186dfa17114eb0c32c3a10468e93809200ef9d2ba6be6054eb25c0d93fbf5. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:49:41Z), 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/ZAS371000164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7f77d334a3f8ac84e23afa6af8bf8c442f2c11d47bdcf674bcf79f112ee6b1. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:08Z), 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/ZAS371000165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25bf6303388f852ac8d3215685ba873c59f196c0ce7c888f1dec250c4ef9801. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ZAS371000166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9035025337bfc55a1682753d726f8a8d6d18114b70b99738d135c4f0cf06c73. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/ZAS371000167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bcac8055bbd1b36161460fbf8db92d97297721c72d78f78b45470c165a6d23. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ZAS371100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8287fe65b7fb2b95cd44dca169e3e455bd389ec0ac44313a5f38b2ccac14fb55. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ZAS371100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a1545c0165a16b594ec4cf42c3a4d5dac2904187a69dae34dc443bbfe41422. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ZAS371100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5d8245e25bfb2663475dc6df37ff4442a4b5017d3b7010a535855a2e65c6e9. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ZAS371100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524f434cff3f567046fe8e4e0623820347f1e4c4f9a325bce8234bccea51e6fd. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:26:37Z), 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/ZAS371100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0990b1d85f6a084db79638226d5d62ca0a26a60ee4cbfadb5db11bf09a64e992. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:37:32Z), 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/ZAS371100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5f637ac9a41bd70dacbf486bdcf5634676a5ac39e23f50ef1d5907bf03911d. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/ZAS371100061.