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 0x278941e13ff79591eddc4ebdc58fe2e16ba040f04b50f0fff68e85f09cfa579c. 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/b321b1b1-0b59-4810-aa9f-faff28b7ad30.json and https://artists.proofprofile.net/proofs/artist/b321b1b1-0b59-4810-aa9f-faff28b7ad30.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 0x3bf6e17f2dc429f12e1f044c25e964205fdf8a7b9c02e8a9dd765bcb87be3c08. 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/QZNWP2450850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b6129eebfe8e723752fb1bbd6be2735e00fc3ae88afed5ed4423a29814921e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZNWP2450851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cc345adf115be133e2938c8e2203a2a5a5b3c59ebca62f661ed02ad178dc4e. 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/QZNWP2450852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c36cae9503f26a1785eae570c4a606d6ac3accbdb978dceb7e748113958ce72. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWP2450853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0a10a7baf52734133fa056a0d8dfc7704be510b5bd95837b3337184c32d2ac. 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/QZNWP2450855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5cd91ed17aea485a8c4fb3359f488e5edf506f33e9b5c139ee9108e781988c. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZNWP2450856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb58ffdd38c5f2088b9fb24d331fb0a23cdaf5fcc7dbf14e0e072f5dc1ec57d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNWP2450839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abfdfb7cd322a68b15b9518ccc198c93b9f7e056b90b5f65f8bec9624d0a21b. 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/QZNWP2450840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6dc6bc7f2a82a216b385c951397b70c15f251006406c35d3ed575eec645dfb. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNWP2450843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e463db17ef7cc09d46a4b06e337094a976407b6a91a03858cca06094cdcea9. 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/QZNWP2450858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5999777867a39db317e7a5e8601a0f3a967f43ab2158964d185ff1679cd9cdba. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/QZNWP2450830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609316dc30d8a80887f49b29030bdc847fdbcf7d8dd72b13eb7662fb867da619. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/QZNWP2450835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f40703703dbe286f02455a380cf1f5ac56b35b110e9b733fb6b840d3a67174. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZNWP2450845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf80eab0daf09dff3d53cbbaf1cc1f44ed5ddbffd1359755d350437ff18d7505. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNWP2450844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d001232bd2dbf5b18853daa404ddb8315bcb27ea8b529d22a10d1f8c15fc95. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZNWP2450848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d001232bd2dbf5b18853daa404ddb8315bcb27ea8b529d22a10d1f8c15fc95. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZNWP2450848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abfdfb7cd322a68b15b9518ccc198c93b9f7e056b90b5f65f8bec9624d0a21b. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZNWP2450840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609316dc30d8a80887f49b29030bdc847fdbcf7d8dd72b13eb7662fb867da619. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZNWP2450835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6dc6bc7f2a82a216b385c951397b70c15f251006406c35d3ed575eec645dfb. 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/QZNWP2450843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5999777867a39db317e7a5e8601a0f3a967f43ab2158964d185ff1679cd9cdba. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZNWP2450830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9fb61fd8e92acebf73e1b8f0a2a1d48193831511b06edec04430c2d35e291b. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZNWP2450833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee117d7ff5f4330dc74c3a5e92453ac711a83bb139a96e90f942818eeec823b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZNWP2450859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b6129eebfe8e723752fb1bbd6be2735e00fc3ae88afed5ed4423a29814921e. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZNWP2450851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf6e17f2dc429f12e1f044c25e964205fdf8a7b9c02e8a9dd765bcb87be3c08. 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/QZNWP2450850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5cd91ed17aea485a8c4fb3359f488e5edf506f33e9b5c139ee9108e781988c. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZNWP2450856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a38ac6d04ec9c482f681f0e54895287a244328837ce4d8c408470f83d93ed4. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZNWP2450834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ca85571f4d26547c4f4ca958e252769b04edd24d5c799f05ff6a254b7767b6. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZNWP2450857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0a10a7baf52734133fa056a0d8dfc7704be510b5bd95837b3337184c32d2ac. 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/QZNWP2450855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb58ffdd38c5f2088b9fb24d331fb0a23cdaf5fcc7dbf14e0e072f5dc1ec57d. 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/QZNWP2450839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fa6646a66c5c6ac5763dd951f299608abbe88a9af9a184662cba8c9d0e00ef. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZNWP2450829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c36cae9503f26a1785eae570c4a606d6ac3accbdb978dceb7e748113958ce72. 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/QZNWP2450853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf80eab0daf09dff3d53cbbaf1cc1f44ed5ddbffd1359755d350437ff18d7505. 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/QZNWP2450844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e463db17ef7cc09d46a4b06e337094a976407b6a91a03858cca06094cdcea9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZNWP2450858.