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 0xf828e62c37dead4cd87df92c41d58641f13cec3b18592e34db8a365fcd4403a4. 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/861fe6e0-6930-4c81-9eab-efbfc46e8133.json and https://artists.proofprofile.net/proofs/artist/861fe6e0-6930-4c81-9eab-efbfc46e8133.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 0x4ffd6a7da7a4295bfe221eb8984ad3aa18757aae495e330f9b3304bb5f390cde. 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/USX9P1401638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda15417e5f9bebc823b264b2ba85f7cf1bef9aca9146f252afad689ffafe70ad. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QM24S1802636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3948de03df7f91f19ef69490cf625020a6c832c04c2c65ead3559a31231a679b. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QM24S1802050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28105f600c887e256891d0f595f4b000d0ae4afb185b156a333fe321c7963068. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZNJV2039567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65851b03c57d3742823120e4c4421b4b8ae7d34ff7f9a38835683f29e622cde0. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZMZ92047028.
Wherever I May Go (from Girl in the Basement)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa296c9941214941a96f2f1bbd94d25505cf55aa73e06481f8e5300b53ca3f16. 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/QZHNC2245921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386a270605d45f988f0a66a28a6b6e0aa18e6f91655772e884395b8ee15e23dd. 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/QZDA72385932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a816078dadc6e80cba05b171da442f11351cea622fd810bdddbdde17cee976. 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/QZTAU2313070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab58849322a731381a58a0bb0f2c4fd7a0e22288f5186244c03ff39c39276389. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTAU2313071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c2053215813012bd7fc0f0fc534b3173955a4c663517ef5b2533cf74627c16. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZFZ22458641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a470e9f296944633b8026403cb122de62fd62eab621d1bf5124a5c42c61f69. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZFZ22458642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392c04ea6df0d2e6cd2af2f4fad510f60eb578c028fa555ddf9b5d34b3b177af. 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/QZK6K2346123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e371a2fa4415d0592ef08b1ece5d35103fe771b551946421093bc3e1c0cd379. 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/QZNWW2343004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6fc64f32898ae41fa0662a64499ca18da4d6dc08fa243283c6d52833bf19fe. 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/QZES62499845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ba69975009d55a6b95a93801c1e519da508b46bdf1e2dd1e6255aa10267494. 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/QZK6F2401939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed091e94a8445a58d0c6837d5f00a7a3fac1cdc16a7b7ae041dfe368ed89854f. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZTAS2424974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc893971f3ca708605ab27545a0e536af9fb498f95d0ad2636d05ecde8d37149e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TLVEM2460722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1c4e7ef65ca66cbaaa688d3a542eadf716275927b4f2550a1a0d440cbfca9d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT2VB2424521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e22227235a9260b483359bffa01ecd6f569de40c3f863374e68faf97f6738a. 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/QZZ7P2426329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702c7271c373075e64e70ff3b0d1cc381d8b4c9deee925c089517ce7a3f3405f. 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/QZ32Y1600002.
Indie/Rock/Alt Compilation - November 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40934fd11bbfb3a97a6e3035b050dc6821d6b0ac1f4551651d0e9907878132ca. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZMEQ2297814.