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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3fc2b6abda6734e1f5a9043d7ecbfd2eca2c99e69d1af7727f45f0f3b83dd7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/401ba441-e307-4870-a675-3705dd27365b.json and https://artists.proofprofile.net/proofs/artist/401ba441-e307-4870-a675-3705dd27365b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0621f0e1ededd221e5f261b1956ccd827891ef9e040ad38469666949f4d1d76. 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/USCGJ2311734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc93e5f70efade227200af4e9ec73745a90cfa6bdc44c5ab62b8a5217a8adb69. 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/USCGJ2311752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39be6bdee7861f15954d789e70d39a5135189eafd33e63db2e2c965312ef9673. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/USHM82336516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551848d55087d5fc9a9a4b3b7ddbc771c67ab148e3c9b5267580a0c006dfc340. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4Q2399980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d1e17262c63cfbf94827960189c3bc1a041c9cbc86cd906487dfa30a9dd8b0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USL4Q2399981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d6d7b358dc9ce80675199c77fbb3d957d5dc5126a44f363b217edb3d4e1ab3. 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/USL4Q2399985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e37a76923660b6ec8a449bccadc34bb340e9bd84f5ddbd85f531e4db54827ff. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4Q2399989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369f89f68689be4c98b3b255e38a9cde3f5a2b99ac48f46cf4319ccadbbeda89. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USL4Q2399992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d66f6eae1c3926988b02159d625b0d728d81b8c331df5c575ee03a776836e54. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:14:02Z), 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/USL4Q2399994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aec674149c48cfdd4a43657cfeb455963716e12a3b5f4ad33ffd787acde1c4b. 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/USL4R2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9db4558042bb8cc850159eeab11a0ebf725fb42ee181c76e61731bf2cfa8068. 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/USL4R2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ae6a3cb1778f07838254ae9be9ed8cbf523ef5726ed1702f090782c8b0f119. 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/USL4R2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b933794c72179f220dd5bd84cf44ba8ddc1ca0a216e42d49b4c48a4b2fbd243. 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/USL4R2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f3d798a39ed4753c641f5fb23701c44955b110fb873a3fda79ef1f2f617da6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USL4R2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629b600b0fc676a26e4827111e714f249089629e5a502842cb099fcfb91c192f. 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/USY282317548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514fcaf87b4f6d79fb49ef57c4389b2a64cf92617786938b178e27bafd1ffac6. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USHM92431350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf186594d30e991b2a7948213b15fabb23b41ffa4959ac9b93cfcd8ab458af007. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZDQH2517535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23cd985be6b89eaa2683df172c85be15f43ca6b38b1ac58505f278bfebd54b3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USL4R2515956.