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 0x1c39117ac1cc6c0e559ec9055976ee558ba70ec8017775562d715fd040103572. 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/cc25bb29-2012-4831-8ce8-ba7c26bf71bd.json and https://artists.proofprofile.net/proofs/artist/cc25bb29-2012-4831-8ce8-ba7c26bf71bd.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 0xb9067a4a2b6e42840f6f8f29f2e8c356724c2e6cc50c31f9f33f12e14b8b6525. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ES71G2211508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa87f5e5961dcfef69f225ea777dbce06b0e90087e5f3e5934d7874b64577f6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/ES71G2211509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f3cf748073a08a723364c75e7465c8cc560e6b04b8d98a1ed94273e3a105e2. 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/ES71G2220010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0435507fb2e9321da4d2acc21086b8e5b1abdd031c282c260070dcfab1b537a4. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/ES71G2220012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73f612e8c3fd78fafc566162fff9e90b9c5c5a0586acc1d4fec621202f2e0f3. 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/ES71G2220014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7475cfb48fded7f8691fa421f085bc75d8857ebf7c725b9c07da906a468f2e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES71G2220015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee87288566392e6f2291dbe4ec889863cf6fb7395d991e186637baccc1cf19f. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/ES71G2220016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bb83599a4dde7a21d55c3a281eb1cbdc3e72e7900b0de2b38795872d69a17a. 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/ES71G2220017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50efda7f925d6c974a0ba4d8db86bdc0c63f62c05e411e7486db436580b1e441. 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/ES71G2223787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d0ebb4ae51ace589ff7ba12633f16c1185fe447dc9abc2c090c08daaf8d239. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2223788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d7e400f3bcd8823a20dd68ba6606ec68c18568d81cb6ddf1bda13f2e04d8f6. 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/ES71G2223790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd27aac67db12d8ffc15812b4043b15793f29c2bdbfda0d5113b47304070d2c. 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/ES71G2223789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eadfd91419a0e93e80ea692e42e23b714ed99d02f0ce699428b60ef2c6feb24. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2223791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b07185bb727a885ff7e35a5c1f20db21080f73ea746754179b640260622a253. 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/ES71G2223792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9b92e9eeaf4f2abfedf334577908500e9af33a4a676f39777c6cb05c85c791. 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/ES71G2223793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7568e2170d3d50fd7f013248b53e7f04566a646f172261103fcfa4d77b11b3ea. 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/ES71G2223794.
Relaxing Piano: Soothing Baby Music, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3805793ed4fbafd1f611ebe8c3ed7d1f2fdc6be7d9d42cf4386bbb3713f2b822. 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/ES71G2309034.
Under The Orange Tree - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6448f6a5e64a1a2acb360dd81bb13492538bfe46a2e28a7a81f2f07256abc9c2. 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/ES71G2309032.
Take Me Out To the Ballgame - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348895bf1196ce444e00cc2f72789a08145302ac76422c620470edcba4cfa82b. 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/ES71G2309035.
Pop Goes The Weasel - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2498e4c13232d375d6b060ee3153cce0c7b113f331b83aa204739f083f2f322e. 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/ES71G2309033.
Ten Green Bottles - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd32cfcc18ee6da5d8e05d2c4e50e83677afaa054963ee71f3aeb95c192268d8. 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/ES71G2309036.
Rain, Rain, Go Away - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988517ae9966092601932c7a66816c96f01346d330042b88b0bb810c1a219df4. 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/ES71G2309037.
One, Two, Three, Four, Five - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ea88c4c3e6766efa53a7d397b9a304a15df26a66aa30c156d3c82c9cce385c. 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/ES71G2309038.
Tom Tom The Piper's Son - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40f7d263bbe070cf404985ceb93769fdf783f44d73e9f6b187c4eeabd801415. 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/ES71G2309039.
Relaxing Piano: Soothing Baby Music, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569cab730cf5141f08d312112fa17b78e3c0a1c9225222678d4d712f4e8dd2ac. 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/ES71G2309041.
Ding Dong Dell - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44feb79ad20a6e8300939ff42cc3ae311e9bd06591549cb161d04e6c89af35f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2309040.
Man on the Flying Trapeze - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb30c5c80940d5b49dd1ad47a32bdc9a2c66c8a42e07ed580c915fdb49b77aa. 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/ES71G2309042.
Waltzing Matilda - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540445b8ea98238148cc8907eccfc5ceabacdfb6164cf7b507261c3b03de3c60. 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/ES71G2309043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956d8469093da248e16e0e307929089c1defd9d886d44112f80f6c900be57371. 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/ES71G2309044.
Goosey Goosey Gander - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3777eb6b8a84938aa06807daaa59e7d48dc8be0d45238e3f90d65c12917a4c96. 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/ES71G2309045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94df890fcc6fa2e61f7b6eb0546745c05568934ab86fbc7c1a9a235bbcab7eb. 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/ES71G2309046.
Little Jack Horner - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e3585200ed6a051b94ab4f98dae28cf47bbcf1f16f5393121ad93fe5e95308. 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/ES71G2309047.
L'abe Igi Orombo - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ade62a7a197e6216d19e21eb1beeab92e328cf96c663a0919bd82ef5104d3c. 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/ES71G2309048.
Here We Go Round the Mulberry Bush - with Rain Forest Sounds
Relaxing Piano: Soothing Baby Music, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa338c2ee04fa76b53da730f2ce122fd4531db5e4a8ba9ff7cf06051462f91b6f. 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/ES71G2311385.
Home, Home on the Range - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc09205de8406f42810a924461375c426f30f4525ff6bd649bb8ad0ee6ea0306. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2311386.
Bobby Shafto's Gone to Sea - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6f7fa674cf23ca438850f50298f6c74d6b8329c3db8a115b6342159c7435cb. 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/ES71G2311389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1bbbdbbb4ac3702d9b396e5e0c29b6c3384982f68d77727670590a4e600d63. 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/ES71G2311390.
Home Sweet Home - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d35cb3568db5cbe2fc18c8df2218828b5ec0b52b86b1a413f1ca9e81683cf8f. 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/ES71G2311395.
Hickory Dickory Dock - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b498f8bf900975c26fd2573fdf7cde4eefdfb826c36f44d16451bd4c30fe01. 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/ES71G2311394.