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 0x21d706f0ee789afcdbca4d182e179f9dc6f1096a287359f07e671a21c992d425. 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/bc00c3db-d4f1-4fda-9277-d5ef95f5c627.json and https://artists.proofprofile.net/proofs/artist/bc00c3db-d4f1-4fda-9277-d5ef95f5c627.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 0xb1b1b1188b018ac6a90105b807b6d9c5e566fab3bd22f9b0ca0b7650d6fc2502. 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/QZK6Q2325489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467491dbbe44cbaabd591473a13bdd65a4450ac019ba508a92c259525c5d586e. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZK6J2327984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0eeeedf63651d241e93c6f09ba544ce66b338f9935bb7312409c630a37dbed. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6H2314123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51678f9ee4ec749660977088bfec2663c725e5afe97615ae5f132cf9fb231027. 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/QZMEM2321425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aad2d7bb11944ae26184618d23e3a5d3c4b0857e0401df94088e05c25f8db0d. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZNWT2307612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9211c3fc87179f792ec50faf9840d5f8ba26fed3a37a89face16b2674b00ccaf. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZNWT2307613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d73a7757ddbc260a22cb63c572ee3fc4810602fd26db143c46dbfb991ce0ec. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/QZTAS2319830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008ed9af0af8707f45aa6175589a4336523e21502a1f42f4e602fcdc671aa749. 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/QZTB52305242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77c27c5001af1ab1e4bf6a34c7a6e35342f63f7bce8b2ccee6cc2c8177ef94f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZTB62395390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f619476b8e8efbf878bb4be599b8bd3b6a1e4720039344e1122574965b367f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB92350378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e38d4f9d2859474f6a37435bf38ff6bfc7473a09f3f83f5f1720ac2453db61. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZWFP2361966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78dde2a9286a0b86ce8bb7b1873a118e27f67435ee81746aaa9f140753d65d9. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZWFP2361967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8769d77baed5df7ece59be187d354417d9367b78709acdf7cb0dc425a33daac4. 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/FRX282448048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f08b0925cdeb2bf4df67747536c4e50829bed0c9464514e566df60d748343b1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/FRX282448050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652c293d9e31cbeefe359bee072d9f153033fdb73444599d66c3c6e0d99de6fd. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:36:45Z), 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/QZK6H2460466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794dd6c5da92d5863df26c09718861c5bee5eafc31184d98563e443b4a99dc76. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:28:18Z), 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/QZHNC2304398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359cca63ce6e8cee7584a81a75d236c887d30e64199cd736a456fd7a625bd8b1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:16Z), 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/QZTAU2430428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a74f37d5d0d82efe48ac057855a988abf6dee730f7bb64dbee0c82fbb3b3025. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTBC2414033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df55a425cffb9a1d9984437d90e33d091f3d56cae010897e74f5a720d0fb747. 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/CBEYJ2428732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284a4c55d77f295f2791bbcda179a47830b0f8ef0be01761c3d232a535b8c10e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CBF8B2418005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd731a29d04ff2d6263b937b2c357b3899544081a7aa8bc6086a13aed01237970. 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/CAHQJ2511252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a2bb1f7f956834c1c32cb367eef3971d5067ff539c3033ad734a4571369dbe. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/CAHQJ2539575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55630cf254f308c3b34e8a064072066a8122103cd0d32e2527332a754900d178. 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/CAHQJ2573049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73410e7d4ca7ad9949f2156542e996d36b0b3b2791c441660b9c786a0a002fa. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CACWV2502497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa981c2b95d46c5c14ffa487fd12701c975d2df84cf8e848a8c361d566c8ab5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CACWV2570861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e14ed5bc04d2eb5a9b7de4ec3cce54b36fb53ae1816d6d7600f6705ccd4c14. 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/CAENV2520206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf495db1f2c77b13ebc01aaa3b13d9f42e024cbb0789016c85cc73679be351f5. 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/CAENV2520207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530c483ebd7fe37f6296431ea037b365ccf19c9356c444786b9c4d68eb389c4d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CAENV2555584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae58e2ab9cf12b5bdb5974a38b1cff38821c6cd483c39345a7d429e1206f8cff. 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/CAENV2599499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e828adcbf380a83d5fca55f994a39c725bfe2e377920f02fb473f67fee5230. 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/CAENV2599482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860a22b4f2bf53a6e823748e0591ab85fd511b18365c60313308f787eb3b1bb4. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:41:57Z), 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/QZZ7K2588034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b2a409a9715920db68b2f47e19a8742879a0e5f125a4b4aeaf9973dbc6d36a. 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/QZZ7S2506173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecf3c69f2d86ad3d8696a85cf8e824e7571fd43c422a972c5515ecbf9bb54e3. 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/QT3EZ2516791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7622631c262b4324894b59d83d0c7a15f687c4bd75b8616def8b9c2ea19e16c6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CBEYJ2569883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3186d6c132be7bfbac7bb1a9035fc781e86156599885431c9556e89ca0248fd. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:47:48Z), 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/QT3FD2543757.