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 0xbd833224764e9a7fc780b4661af324ea6e2be50baad53c5f41d7654abee750d0. 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/08af860e-889e-439d-8e06-16a40e97dd89.json and https://artists.proofprofile.net/proofs/artist/08af860e-889e-439d-8e06-16a40e97dd89.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 0xb088e40bf8024efc9e364288b885838922311b2eb2fc13dbc251d3c727654615. 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/QZNWY2337164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea64392311166f7e3fded0e981620c62626b0da541d56f8e5832b4a5db4cded. 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/QZK6J2352593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089ee73f6887653aea4a5103fffe15ea010b38db6393879c198880b155f6e5fa. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6M2457074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ab13c53d58b7dcaa2bd19f0a9042e1b43f942fbb23a7375c7068eb56d40dec. 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/QZTAW2306194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b34e5b843bab8221f478edc43d2dcb56e2f05125cd01ac69dedb7e44f3d3c74. 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/QZHN42424945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190141296359c92e6981f2053d57715dc773759a4f20ae1f62763c42ec3e4729. 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/QZHN92459214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefd30feada4b2e3dbff5094abbce3e4d7cc0acb649e2ffd4d31e7f57314d89d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6G2472165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb008933bd90f42a8baad4a7750b9d6b9904101e068017cc30a41cd902afbe5d. 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/QZK6Q2481414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089ee73f6887653aea4a5103fffe15ea010b38db6393879c198880b155f6e5fa. 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/QZK6M2457074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672f0cf28758b844565d9ab27c56ed54d1be9341d303939eb2dff25c41eac129. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHNB2497970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cfcfb8c85e04c8bd6351543feb1c066a06fa7ca2224c186739ddeec3e34a16. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6G2472166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49886c4b5815560b8691138fef460c341e566e279d1daaac32d922001afc9c50. 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/QZHN82436077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ba0a3e47bf020a8a737b38f5c6f04c04d8778321f9491ab1b9a682bc886f9b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6G2472167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2a6510aa222d37e3354bf25e53afda9a91218c676c7f843b9daf534e648062. 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/QZES72218109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd456b387ee284d77690ecdbcd8653113e158c20f588e22f356ccf7df8dd79e92. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN72223009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9e479992535a3a3c8df3a30de1a5276d9b57fd385cf913775e8b5619e1b024. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZHN72223011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b256953c355777da94c69160cbfdae8699db9089e2f88e6dd778e7177952ac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTBA2480409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a63190d21aff3df4d7419c2885965c9fbaab3025c7a2e99c23f5fc62b0dc7d. 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/QZTAZ2406489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad4d4ff778a7393259b882371fabb4463a92f3a08cde5de19366dde37ad4a89. 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/QZNWV2424875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1745ca1e0c83ecce50265edb5ff0bfa24fb7e1ac7edcd121abc6787e4292721e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES82483564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ba703ff8458d48caf0ff8dd740a5e8da2b6b7820679b08b5e451efa2f6f697. 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/QZDA52465017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a537d63526a7c3348ebb3f4b875bfbda8eab9c3dd76e7f9ba09353b42f3fe4. 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/QZWFG2381028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e9d498aae99e94597e15ea19ffd50deac7a53666fe38bc0935de42b636639b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE62M2377769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1043d968f1a0844937ef71690aff07d7859a6381ffd12f62bd5b8f93d9b458dc. 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/QZTB92365395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb26b152b877b114c313d6fb9faed7d10f8c979b827b930eedac84db5c01b77. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB62316350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b34ac33b7b26ac4b216a3c86fa384f68373f49d111dcbe9acfcdca4e68c7eb. 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/QZNWV2363888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446b8b2891d9c206619bce23ef964f7059abdb9bea772a672a19dc21d2835eeb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6N2351738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bd6baa8b1ac0d8b20378434d4ecedd86096f1c96cd5b12e6393a7a8307c3fd. 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/QZK6Q2321060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc25a54d071c20dd138856a0cc63f5120dfec3da82a4b4f1b31c21406785ba60. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6N2351739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf374978f27075497a113aaaed9ff1c5f8a6352eeee8fd25c27f6035310388c0. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZK6N2351737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8374f69345e484190fc8ab502e94aeef85042f269a0e03390c5c91e6935463a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFYX2361322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4d9f937ed13378b053b0b7a74432313b2c447d6a917db380aaa94a681eee7c. 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/QZTB82221967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55af7182a9f1d6816a3eb607c55e336fc8eb9f08615065d516e09682321932bf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZTB32291528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298f6f151e15dc857b07be501e860ab2420edb46ae0cce65cb392d1440329bd5. 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/QZTB32291529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2aa24fb902d2e3e241520e9da55f4ec5b4d132fa63166d30502d2252e262ca. 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/QZTAY2223552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0b9787c6f7e17137ddd1684085fefb3db6cd6eac35d57e05713d332d9cfbc3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEN2269332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d74ac6c2a008811559ec8906f5bfef4d5d43fd78923d86983392f252bc093f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZJRC2080239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea40e666d81821521ea7bee7572345e15482252887044521217917667aa1145. 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/QZTBD2354397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb79c43a52f67d27ea45569dcf7e68b843879d1df883c59cfa36cc97fd701c1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTBD2354398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f11f34cb73158b8e19843880441a4bdc744fb53476f14b794719699a16118fc. 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/QZNWW2365361.