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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf139a9e7924e4b195641a9a419281ced7eee624c7f6dbee267aa2987a46d1c9a. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c44319cb-21b6-4e33-8191-e7b213b934a5.json and https://artists.proofprofile.net/proofs/artist/c44319cb-21b6-4e33-8191-e7b213b934a5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dfca1fc664554f1d2ebe4352d29482a7aa08de23a1cc2832e15b564eaf965a. 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/QZNWW2389999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2eb41e45977bda53e5342ea70b1881612fad9369743fa7903238cae868ef122. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWQ2387756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484330cda8e6340cf348303235e3adab3c359039838f976e8ce31c2e60377836. 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/QZMEP2292985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e68988ca45bf876701d9ce3728cb59b14e2c007dcc05f1840614af05cdc163. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZMEP2292988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620e6b9710ae5fd96ba590e8f8078424e4578d3643dc1f201535fece71c3e270. 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/QZMEP2292989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1b74a1f2b91de4d4c07086ba225ddd9b233eeea8ee9e3b6cf72e65984084cb. 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/QZMEP2292990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a3f4a13953e5e3e2d6c1ad045c84952f02737d597d7838d8519efb717e691e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:27Z), 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/QZMEP2292984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e10e900fd879e2ec8f0d2274f984f48069a36ac94f03c2c93ec4ce78f07626e. 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/QZHN62428910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe313725721f86f734a36385d594245dfae9018c352407707e8e32d8962b3361f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZES82473878.
A Class & 6ix (Stems Acoustic Performance)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09f085cf2fd1f826d41822290d11a781b21ce6196b894aec51585f2b1648ee4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZTB82327014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2eb41e45977bda53e5342ea70b1881612fad9369743fa7903238cae868ef122. 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/QZNWQ2387756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a6c0187ab2ce89705a81b4835c6eb41aca3041699e842e9db1d1a1fd6fa452. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:28:45Z), 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/QZMEP2324042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7ffb5f9e3c94a4b2711f927fa856f400e64993f3e80c25a4a27140f13e0f58. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEP2324043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6c604399d373effb34db328700465873d48382aaabc10922bde8a1780f679f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZMEP2324044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf75aadf8178106ed5b37dbdaac98804fcde497916426d19674ea28778d09b59. 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/QZES92376688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fe40501b1601a3ea014f1ccaaf4d692be14ebd820ba7969e8bfd5b11b0fbd1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6K2339870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83efa02f0a3ef980f3289039949fe87df03dbf0889eb52ef1b4cf41307124b99. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBLFP2321041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b63314820e999874e8b02666597b42c1e3ea9624a749383a8a0b6c0d0b7f2b. 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/QZHN82347423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce99580443e2c0363b065d61583481b6aeed660a041b5b92091e9e1c6a712b5. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:51:29Z), 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/QZDA52373077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2288c136f6d868e8eb0a22ea638a41f95a8278484f7a0492b2ac43f5664e70b. 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/QZDA52373078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494232972885ea5feeb65baff98654bc4ab48670340d163dc159ebf1f2da77eb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA52373079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de757288da1132b61206e7a38c5f2d681fe209709e741498586c8f24e636012. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:28:06Z), 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/QZNWW2295895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeae29b87cc425091a2d5f41f7d2c76ea5b92be740bec9bc1366b215b5fd2ba4. 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/QZK6K2245660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bda7f3542bc7cd41cbfabff6659b89f0a345551e4df1ba52f4a67717f13f1b. 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/QZK6K2245661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5381e623cf9f96e8683f21bf474d218853ca9a008c7a47d6ec6ea93c46c05c3c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6N2239864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c8e605fa7c42c5c8c5ac24c00105cfa4cc15b85a1b8b12fdd8e495d65cf997. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:10:48Z), 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/QZES92249446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25aa2b129d733068daf7cd5bbfdeb3dcfc6ffa8fbcc6ff4f6b61916086ef351. 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/QZES72231055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9d7209552b43f98f3b295670e88824fae2be340bc294e25f60ddbfdccb2d00. 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/QZES72231056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a352e100cbe2b1bd449db1412ba8fa441d3d3c7ccb0e696ee22e54e86ce22cc. 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/QZFZ22284356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790be884bce57c927f338d040b50c77ef9df87ae4d70796ef90901f43e0775a6. 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/USL4Q2108587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b57bf0ea839103d2c6be37dc9df582663b9f58f5c5b26b187d6e6abb07c494a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA62132820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b939a8bc4bb95ce04dcb3aeade16ba7b5178d73692a49d29f40f03b87a3ea6. 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/QZNWU2053381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1479d0ad615df778539f8782ab5dc7205a7cec45451a5d5fe258ce097f88330. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SE5752320946.