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 0xcead8e23b609a6150e75f259c69b9ba5bc2891f78ba498547a488f72be1629ed. 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/3e5bd7d9-b01c-40b5-9c3f-a5d5d779f750.json and https://artists.proofprofile.net/proofs/artist/3e5bd7d9-b01c-40b5-9c3f-a5d5d779f750.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 0xfc6ebc5d84b04fad9e42fe15fba57c3a48956f3ccb195747a1dcb5e17eafaae3. 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/US25X2301250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc9d4d716552183a5c52c10c1694508c72c5cc393a79873531a86c3649fdfe8. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/US25X2301329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d468926d8c0fe7afd87ec450ce87ef8052374348c757cd773dcb559f40bebe. 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/QZNWR2334022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb062250e049825099b5fe501b4dd036272338ca9dfb4f2dfffef13f97e578e53. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZTBA2308489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab05f2a2cc1a5a28a39f3d72ec1ca8adaf46a08f6b240913964d8f77cdc6abb. 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/QZTBE2321232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1ee0fa29d9990db818de791c12f02594062a3e68cf0e4547757eceff340617. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZTBE2334884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a817d476771dbf17a7899816fd5e3db211bab5318201fe134a5458659090e5f. 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/QZTB52393992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dae9bfb3030bc3c634bf8153c68428fc850d4fb163f9ceccb8a6816a2632e6e. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZTAS2302913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c557c2cebe139a508278bc4fac6d7781cae5b25ca3dd051d9a487b925ee0c46. 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/QZNWZ2350384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770fa755db156b616ed3810563882f5c1f5c5dffb3aabdd21fb6010e9cedc09c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTBA2308947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffead5d50ec1774b08208cb34d2d54772827234577fd078cbd85ffadc048a0a. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZHN42433825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b50330aff182bad4fb30a8a09f08b3a312d2d1cbb0eb5a486f08fd0ca9fc39b. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZMER2495819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49a5b70dacdc3833d2a6437b61b0bcd1bf9be24d2991d0f50412bc587664a25. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZMER2495820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f42881a67e116e870fb2276b2f387e89812cb4023bfce4e9710449cc9bada6. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZMER2495821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd952cb4122c38825fca0abb722a8e3b87fe047283655f5bcd1c56d4fb3c46cf. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZMEN2401346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4fec15ed9c70faaf8d1e74a86d6f64297a4fe25c7d3f999d750f7ac3d8048d. 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/QZMER2495822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf543a751341f1b6041b7e656a2c2742787f7e3ab2235ba512f3251f0d85a7a66. 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/QZTB42447040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8d1ff987fc79959a0118994a7484a52adeaebee4714d3693477209ef3507b1. 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/QZTB42447042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4877280414d42f40ac280773b4f14a308505637011d6f41a6da30c920d4a29cb. 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/QZNWX2429677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcbb90c444a2657ef4522ca63194741fa316f24fd5de886ea90d936a5804759. 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/QZTB42447043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2ab8abfca3881c6062ab891c1fe04b709b6fc598aceac9549c3b2f68f62565. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZRP52414826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2234493081f64e849f8ebddb02bc580763f02a5da2da043b0215f885f0b990. 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/QZWFQ2471098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b2c3859944c05f5d20d7531f752532d2549ca829a2fc87f7c7901ef7d2f387. 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/QZWFQ2471103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c519f7f7d8a402be0e20b4954478a7685fe5d47eb9830d6f73d2c72609a71b. 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/QM24S2504211.