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 0xf2621f98be9a40ebc86a97310488c14de144a29171091c6b2f73bccba2bf9132. 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/e2e1b813-e754-4846-b18f-b581e82c02dd.json and https://artists.proofprofile.net/proofs/artist/e2e1b813-e754-4846-b18f-b581e82c02dd.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 0xe96c58951cbc8afe2992db18d6450ee909b393cb055b68f41b27d43224e27246. 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/INV111701062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597947df8f2cf8afde013860e2cd57d96cd79c972704ec40a8e6a7d0dbd9bfaf. 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/INS181900421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5324094fae3e08f43a30e06d3899d97e8771b47417c68dac4c1c05a9b8087b64. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/INL232004523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f7063c3f11b0985c963b3ded44886f7e435f211356834b8ef591268a68cb11. 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/FRX762014865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729165cd0913fb6c481738619ef159f30766d7ad2c4dc16d2398b1a1b7325f05. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:43:14Z), 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/INL239003936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cd3899b8b8bc0cbea15eeacaf9634c6d363cb4f1332c7005724ae485b4da7a. 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/FRX762157076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908f03437ef02880b19b361dee85093803b90b31d34488c4028ef01d7b390f04. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR96X2211610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346584fc177c29609a7b1bfa1d3af9c87757dcdedb9257059721d0e529fa0f1e. 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/INS402200141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f4086743ec9721eab9fcfd7109920ec8ac42987b661b4e1f9fd12e4700b655. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USA2P2321651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a80315787af7fce95553607da57944f5b092209431898819696c76537102333. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/INS182203883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c46aaf1139c6a53a78e1386bbf8a2b24a8e8e71aa65bc13aa0f3f47d281cd2d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:35:43Z), 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/TCAHJ2340406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c46aaf1139c6a53a78e1386bbf8a2b24a8e8e71aa65bc13aa0f3f47d281cd2d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAHJ2340406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644962c2a571192969c2e8f4d6fb51cf55ab7f8e5bbd5e829ee97c4255788e5d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAHP2331720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e2aa37cc72028175fb5cbdaf5722995ad23a33363a412d7cf9f36710820980. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM4TW2402375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e2aa37cc72028175fb5cbdaf5722995ad23a33363a412d7cf9f36710820980. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QM4TW2402375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029dbb2ac64195ce2354f428f434378a4510e2d78ab74104035ef54d6e072980. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QM4TW2441026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900e0e0da1fe020c865604fe3134f30896c43f549914af0f12b8b219ecfd77b2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM4TW2425971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0871464ea8052a2848a40ff3ada696cc9eafd97496d6ef70920092ff5c84756. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX282499770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4ee2f142e07a07ce0d72d8f5c576eca7a2b51fd5004a3fa6df623968183b32. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:26:22Z), 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/INM402401467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce2eac7ff231ca70e30b2a7891fc556b4cc7681b36f40e3192b3bec517721cf. 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/QM6P42471624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87da7388f53da98632e97ca07093e6276eb74a7a29388d10a9d0976bfa286a55. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DGA062494299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817115bb56f1dda5c7c67af7a5b8f2a885830c22bc074bb08f6256aa5516147e. 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/DGA0L2452329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0683a709be31a2ebbd96bc0238426b2c0d00e60067398032bf7054dc470d07fd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US38Y2502481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7badd8a1887c42499edfe18310be2ba90c3cadff2ea7a2a96fc887771cfebb. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:35:50Z), 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/THW092500911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4f7a4d0d964b9337b86324a369d44e3692bfebe9ca7582a0a24a5728c55724. 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/THW092501552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29916281b19a6629898bcd4f4f3bdeddb19be3a69f7b72186a80b5a6e6e6dcd5. 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/US38Y2547191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c9047e0a1ec96baba3be4aecabf7ae95ec75a7ed6aeabc01150dffc171b476. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA062465518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57bace5eb878e54c766735ac267b528e951869af59b556feaf593ea8258c56c. 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/USA2P2425013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7eda754050208a1e13d5bdcbd1e539ed367e59d4b116d84110a5469468141ef. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/TCAHC2362980.
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