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 0x803dd5e7b7a41780367e436b711b0f890902d882681a6aa654bbce610c411f42. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4fed33f1-f79f-422f-924c-5c6cd063b73f.json and https://artists.proofprofile.net/proofs/artist/4fed33f1-f79f-422f-924c-5c6cd063b73f.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 0x02a7e9940303bf4370e5fb8cf31cdf86b9a97249c5f2ec21b688b35845c798d7. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/USCG40810056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3659b94228b7a14836e89faff181804e0be33d4a02383b74b9c09e4faa45cf9c. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:42:01Z), 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/USCG40810057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5470bc3ce46021762a25f65a809d1b97aaf94e9c2d709b8edded211479a72c. 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/USCG40810058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8112023cba278ddb647104b5856b1eefa1f253a4bbebf7cf1e3439189c5e6e5f. 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/USCG40810059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472408ed6175aa3ff03bb66f4454e70017aaf41d659d305d26c57bf4ea4159c6. 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/USCG40810061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4caa4ab0eed91b31ffb6f042580cde9d54d2f9f6cd73d26019acf4a7dd3e503. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USA560944950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4517a55bf50d67ec0a228a4ca9dcc756c0f82f88686c67b34ec9159ec894fe. 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/USA560944953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cc400235453c1df42ab4efbea2dec277bbe419e49a045500421c76d242ee9a. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/USA560944954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bd8a7fdfc8a4031fb052623c51a63d0f69b738c36790d24e099401a671b476. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USVIC1161302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165d8311f61e7ddd14f6a925fe52da5853e395ca640fa00f325560884c049e31. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USVIC1161307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837c224dbcec95a73ed16e052b0ebc4195200a721e69fe720ce8aa01253f83c9. 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/USVIC1161310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80792b4b9767baca30f24fec2a2808e37d0ab5a1393c5af751af9bedae0ea79f. 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/USVIC1161311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd3f19b94136be5a68bc51c6ff332392d76f4036e42a1af567a3fa8171d8563. 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/USVIC1161312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a7d4f70bb7528e7d9d76915357ff0fb0aae8ebb689fd7ab93971b75ab1af67. 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/USVIC1161313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662c256180bfeab1aa1954c73a51d3a3b287ea19175677af9b7ef4238f56fc25. 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/QZK6J2296759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cddd42f76df1c9fba76a805aa57a3e62674f7c00b2ca4cfb74ec7c128f2c353. 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/QZK6J2252366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2393213d95c5c313fa451de7827bd498daa710cfb249a9e9c164c620b1163b1d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:53:57Z), 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/QZK6J2296760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6286ebb19dbd14c986bceb2868d55329a545835b93e23d453d5ac4437ddec40. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZK6J2296762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33465be2e7ab8ecba9b0d8165ba90aa2b02b5eb36a6871835e3164fd7306cf9a. 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/QZK6J2296764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816fac255a488102bfbc2b1cf98e136e936e140eb6a063bc62d2bcc5d06420c1. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZK6J2296768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4d92de0ef13b2cbabfa91724c05bdad9a736ab0aaa011837d0c04b9cc7415d. 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/QZK6J2296770.