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 0xee40e6c40c4351f175805a6dbe7fb839ac7bfec8e3609aac97c05b99ad5b1d75. 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/b2c1ff66-e54c-4122-99b0-ce04d177358f.json and https://artists.proofprofile.net/proofs/artist/b2c1ff66-e54c-4122-99b0-ce04d177358f.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 0x295d84532e6c3f164de1719e8c30e572fa3c26e66ecc7cbda6b6e58d99a21b7f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:28:35Z), 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/QZGLM2203552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8c4a2176472efbaed7cbaacd4d11320c2c08ad16178ace06405c1e788639fb. 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/QZGLM2203550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295d84532e6c3f164de1719e8c30e572fa3c26e66ecc7cbda6b6e58d99a21b7f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZGLM2203552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265c389837a08a36ce5d8286d1e239118ba094df7a1f2d6d41f080052e0600a3. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/QZHZ42294895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fff1f61eb66dd4dd57dbdf324c68471e446ee62c060d02895a494e70ae4503d. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZHZ62205402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094e8e0672554e3f3ac64864fe2fd79693ef6f3abcc57fe2da7e03703a505851. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZNJX2258809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d43b6f583e1475eb4b8c512bf01fd977d08f603bf67c07c7bae914dc1a94af2. 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/QZTVM2264132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f79ae1b4f35c40776c215aae93549967837061b412540807cf6481de5755bd. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZW9M2233566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bbf241b924e84e05b4244b88106b975c7a8dddf1f4d0e3d3d809906378ad15. 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/ITF252300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311ac33af45780d8517fa11e61798f668eb735de4c854f8997f08ae1514a7b35. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZNJV2325246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31de1f2195b317d457cc72ea9fc52924b2151078ab2bccb590cdeb58cb6100a3. 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/QZWDW2388957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5679b0ae624634e257e3d5b7e165aece447e509d6694c18ad968692bf24586e8. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZTVM2311003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b089a82eef429b7cb1a050240bd5909b2bb04c953bf8ce5fa3737f19db710cc. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:10:11Z), 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/QZTVM2311004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028e78f48c8085ba96b28c6abb112933cd010bc11a86408f2105c80b52650876. 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/QZTPX2386464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631182c2d6d3ba0e6d98c0be66f273309aa5773a2445ec26518e2a253bacb423. 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/QZZ662408141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af6845d7f06187f8d308dc6f5a64e8d3992ef3be96ad80a18aef9406ad51079. 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/QZZ662427719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6f1d4d5958aba3c8dc2ab757c1472bded79576230f438adb171b9bed8babc5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZ662461638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eccf7ad8dd60dfd2a9c074762d578fcee48ed935bb359645f1656f76b84056a. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:43:11Z), 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/QM6N22457792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ec8317547d491135d31259ef97919ea3f665aa0bd1d874fbde99eb24b87a67. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJW2465706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb9eeffc54aab8d745cf5f382c6445f786327c7d89ebd53f5263e4630f78153. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZNJV2325244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc133b82fe04c58225cba6d454a3e3cc80eec965910c2856dd4f1ffde6d61b48a. 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/QZWDW2419012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9f16eb217feb67207ee501e9a8ea93f69122ff7d735c498b43539b138bd526. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/SE6SA2445586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb1aeb192ac2b7a4e17b6845f8c9f4c0130576d7ea8ba8570c70f3cfe569b3d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/US7VG2592748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dd88e16958fc5b9e60bfe997a3c8cb3a011a96dc9bdd994c48033c9f8f0c9f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLS2591891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2467a9cc16b99dcaff8ecccaefd18f3535d492bd3ad0c41434c2157dd91c354. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/SE6QE2518202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd161238f0be73baa0f6de3b5bee2aa90ad35c36fee3ee3967f49bebc0f8c1a. 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/QZTPX2114697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9c1f6e1aba47e4828c32231a50abe64990aa1c9a0a366be2b32d68208361e8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZYFZ2479308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5792cb8e3024a556fda871fef255522a7249f860c2c5cba9d83214975c743b8. 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/QZEZZ2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b739ba7e370e6620b1db6c2315442a04b07edc5c62dffb1f037e23c8cb3bc5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZW9M2252537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042887d97574570e621874e3de913ba51aececd526baeecbd9e0880b410818df. 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/QMBZ92499834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b634fd5fedad297da17f060c3266fa8b911fd9c44e9d37b655a067309c57ae3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2517884.