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 0x2f27f80edef2c519c34b33669052375d1588790170c589756f88957dd004e990. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efb39f6b-6c0a-42b4-b9d2-e88318636f7d.json and https://artists.proofprofile.net/proofs/artist/efb39f6b-6c0a-42b4-b9d2-e88318636f7d.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 0x10ecb7abd5b4733eea253bdb5820e265a9006df31df10f27ef62e21a0fcf675d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM80828219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09616dd9e24550cf26bb6fe8622ba1f269fa36497673ac3fcf527e1c4869c63. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM80828221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccca105d1f1bb1c39245f475b85c27a721c44002a7e95cf53621d81c0b30566. 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/USHM80828223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cb39d12436a051b91042e53381db7a56d13583323801e77f6de262f73b45ae. 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/USHM80828224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759012dc2b2d09d8de1817b9b1b6b4dd720a54b539b60a541b076f9e08022655. 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/USHM80828225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f6f62ef425d8b2f95d18868897bee930ae5e7077d5a296eab5c7fdc6c94da8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USHM80828226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b8f511f69f0eb195a9e539fb869d50ff1cde977cb2c54fb599d8ec82db29b1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USHM80828227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62871e69055a59069300940e604e3467620e3f77f7a20cf33c23e710167ad76. 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/USHM80828229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98cabeb0d8ef952083510ccb9da97ebf8955731fcd59eddfbd774f305092e16. 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/USHM80828232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a29df006013ccf22eb9b5454ec3c7cc6299346a3410702fcb1d80a84f15154. 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/USHM80828235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefeaf5fe3a2bebfe4b218017bf8967e1aa5600648950852f49922c3d60d9823. 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/USHM80828236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b5cb21b8e8bb185aae93fe09e8881c019b79b5f21192dba7034c8cfcc14679. 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/USHM80828239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55153a5ba303bc378d96a4a1fb0de3daea91c694a5d7a03b9aaac6573b8b98bb. 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/USHM80828242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b01d5e14ad5d11d40902872e33826ae843c9ca2c14c823d74afdac1aead8c99. 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/USHM80828244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778d4aba8968ebd3a35515168c4a64ce5b40477d320a9b530aae9000001fc020. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:09:25Z), 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/USHM80828222.
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 0x45644ad1eaa52c1a1296dedc7e2eef3bf2b9d914e558eab67936c3ed58acb74e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM80828220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c826dca830ed0cd74f2ca901cd9b796019b79088210eacdaa55b137e8c1cd0b. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USHM80828228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34011b062355ff2bc4ad3d4e333b9d6b12777a8f44724cc3aca2d29efa3a07cc. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USHM80828230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4053929e014d8e1d2e96f3dc8f5f4c20ba908cd7248ab1d75b2dd9052dcc5540. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USHM80828231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5c99b22f8f54842123a25e6123b3400bf24952d9a1dac52cee8904657fea73. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USHM80828233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abc4c0fdd27b61e0f34b19d35f1c24c1977f34b62e4501fde1780e649b95ee8. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/USHM80828234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319a2eda8b4648be53f72160734f7002d650c0357b0e4968ccea923a7e69dc20. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USHM80828237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3931a80af9b175d6679bc8412a0e462bdb3db9bccbe3a1463442f7661c959923. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM80828238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06157c8188b40bc5e18918bb402869d961e6f497fe3bc81e99d63aca20da6b49. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USHM80828240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9519d063cffbe9d1c8a8357d830df3d6d7016ea4d718d5af0bc400b1385f1a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USHM80828241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbfd2f5e7ca52ecebb70e89e5d1d3315ec9aabdf7072ea1c17401144a1f3ee6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USHM80828243.