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 0x9b67da7c7f64694eefde33ebe448b7cc81dad1d89ac48a91456b55bac5b2eb20. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2557f90b-ebf0-4e03-bcd9-edc30ff19c7b.json and https://artists.proofprofile.net/proofs/artist/2557f90b-ebf0-4e03-bcd9-edc30ff19c7b.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 0xc7b0a4fa7f3bce141287356e962b59b02c978c5a7469045b673e159996814087. 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/QZWV32553027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51554ac68bff97a27a2c55bec073555b6338e65a38ea970133c38c00074e28a3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWV32553004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994d106338d16c435612fa3fcde06fa2fcd5ad0879e87934b8070239493701e8. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:48:24Z), 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/QZWV32552952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5aa9c43861d310bc0b1ca2f21101f2e5d08a871ef15cf79020a9f9a35d54e5. 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/QZWV32553033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c65c2102b5708a76a31e3716b8298e80204c25dbf5a6527aadd0d11b32c7f9d. 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/QZWV32551941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0191720c7f5f496fc3db0c1dac66ce50fa2012dfcca8e0a479bf84dabe08b66d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:43:48Z), 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/QZWV32553051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739f9ee5c03ceebd55e552bd8a9736e4888900e703d850fe5fafbab9826a9b88. 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/QZWV32553055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91faf4565c43f9c878c27dd6014aab833b85134dd9ea239136f6c9803ff50f8f. 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/QZWV32552992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490091e441a9270a20faba3f64c2f0131991ba690dbb7fb474232df9e09ac673. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZWV32552999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045b7a3bdae6efee7948a74bebc028e11f4be499b09f5d13aab34dfa6438c485. 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/QZWV32553061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4e64d331cff54592468fe6e60f6c8d954f5e9088e9e05f78bf3fe2d11507d7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWV32552987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71759f4a3ff5ff09a5ca8c0159e09165984a66f5017c52ee32211ac5e817382c. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZWV32553084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b9d6cdd3fa025e4408e7b13e0bf4e6d4f314c54b827e9a7ec9242c8f3ea548. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:40Z), 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/QZWV32553091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0b8ce3343fcaec048eb0ebe10b9ed1e9a7449e7b6393b0a5c2f57b02a4f52d. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:41:28Z), 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/QZWV32553023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b62db22ce108bb409546e1b87b1203701043cefdb14309841e47b77846f16aa. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/QZWV32558336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029659f9980192cada28f9e2c0e97132eac4ebe2722e349203d61570f32c14ef. 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/QZWV32558090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567c102248cc2adc1a60ff070124b36d9e040337446fdbeb89a7f50201713632. 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/QZWV32558371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c71ad99512dcd576f88b7e9b6a306bd566bbe616388928b680c5183adf2f51. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:23:33Z), 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/QZWV32558323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68bb5a1f9322a9f40616064d3eb08451969c4d3aa47a518c4da0f988db00eeb. 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/QZWV32558355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186549bf8a5e37bcdea592c837e1f81bfef873e0677d5e732fc6e5b1c087894a. 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/QZWV32558078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d47e76e0c407e68e3fb2aa5f408c0f4a0883e378f4bb25676602f6fdefed4d. 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/QZWFE2581896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee31927eed14b08d8bfe9b2d2558d583171107a7fc5181678040e3cc6fa0ea4e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFE2581919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32d29b7e2723966c382f3826eb3a7cf36b011468767e3047e5858da89429f66. 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/QZWFE2581972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d2cfe56a3d3111ede8dd5d4b5632f37668ccb4f3882601103519cb6cffe960. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T03:01:16Z), 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/QZWFE2581922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316c5b7804e86b213d435c3022b1c8d81e23214ee0786f118443be7753df1dcf. 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/QZWFE2581920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7d02ed65f51d67137a2c931117aa265469275d5e3e0938b61ab1a038f339af. 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/QZWFE2581969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55024eb650fc0ea055e27d53656b931168826d8ee5d771c440aaa0ece3d97633. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFE2579387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290d7c6ebebbc10d1c1380b2b2a5c48d4202efd60477ee5f0d29d2aeaa128c18. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:39:32Z), 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/QZWFE2581968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279fcff18b0b4172ff42d912c29be21c401be172c3afcf2185e25dfa4adcb93a. 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/QZWFE2595581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244712a897d139012ab001537a597eeb2302fd9c051818481fa66a51e3052bc4. 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/QZWFE2593643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd901b6f1ae7c60e9415de5c6379c3964107afd57dc5511e9f7241d67e91e78. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFE2595527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5ae126510a8cf7c2f39782202dc700a571c41e10b5356ce43de36bb93d9433. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZWFE2595547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d231766df9fc1395e4c4bbd0a0473af2aa1f60d02580477dfca1a1efbe21f6. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:12:27Z), 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/QZWFE2595586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6c987f215e63566cb0bce82a78b0caa9e4732ccc3e3111c40ee5465aba4608. 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/QZWFE2595589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc17adda02149f7361d0a8cf3e1eb52f15038885a96954a48199481b323f26c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZWFE2595552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c57bf1c746e31823cda99e2074efd5b87155ff737aa64fe7bbfba1f89c58555. 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/QZWFE2593554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81054ec2a071ac3d3bd9c5df2a63d2fb54ed2235eef719b4103644fa860fa8b. 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/QZWV32571901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86afbb3f0489869bce8c5f80ce7aca0332955846dc30103bf67e87f6abad9ed5. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:44:53Z), 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/QZWV32571922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82354628b8ddb82c2347e483967b9c5952171a453958cdc0308f7440dd201be. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWV32571916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8136f1c1545721de1969678d36887d834b4824733738dec0d2f5821e6286abf2. 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/QZWV32571904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71d48a10926ffb5d44ee2cf0c05af9187a57d0afeca4cb3502f47ae50001699. 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/QZWV32571928.