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 0xb9f1411b4e273cbc10fa56612a5761aa71a95f6f6dbdf835a74e0d42c65a4409. 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/5068d81b-235f-4d7c-b7ba-ac463db904c2.json and https://artists.proofprofile.net/proofs/artist/5068d81b-235f-4d7c-b7ba-ac463db904c2.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 0x0cd85031d59094e48e430082a0825a9b4488a5eae70aaa671670f45b59b1d05c. 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/CHF032347749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a14300fc554711b4f7f85b018ffedc89b4a1b05ae0f919cd337e6b0c490640. 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/SE62M2228999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd272bc7f96c363f325a0c98d58f51743585dbd44954190d57e6b9d5624d8f39e. 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/SE5BU2268036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43e02534139d31b1c24918fd6088890b2f00dcf585f8911424b4008e42f4a09. 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/TCAHE2347176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf62d3d661718e9bcb1d7d3227b6f0e7b006110e6bb3450e3132ee0a9ef4cf3a. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/TCAHE2380075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3634a4e226527c9b9888fbcbe6ce59567d05a68b8d6f76cc1ec00eaf903ca385. 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/TCAHP2364586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d6d5e9fd8e548f858e24dac8e3c73c5cefa34d6eb63313744647b7a9408c18. 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/TCAHW2429764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae59c73dccf171579308e6457aa3e2853c613552fb677d336581653d43a9380. 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/TCAHY2405487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5707d669b48033aebf4e7c20e38e8f3cd49ed37277e60c4297b612eb14577287. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAIF2412989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6223b1949755556f743236d0b41c9c03d89f8c7e76b927514d5d141cabf284c4. 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/TCAIF2412996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd999c466568ce073fbeac2b73327d416eb4636a35e7e210e225982fc98482435. 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/TCAIF2413000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d662dc7ada4d07dae98fa1c55dbb0d1494a786558436314261e7725946c4ebd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAIF2413008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf71f607f5c9c4336a4ffac5cb3d60fb73ab74ea25af0193d9282990670371f. 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/TCAII2400266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4b8bcf2d46847e33dd27c2617eb19ad7464daf42cc6f5c3f9c9e0b90a3decd. 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/TCAIJ2400276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901555f050ef75bdef0de472a7e73dd472f362250036004070dd7c985d1f9c7a. 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/TCAIJ2400280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d03591a809e3b3170a5b7e943a20c3d29c5b5387e1ec380009bfbdd542aa6d2. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAII2400288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60389f674686919ad6cef36d30476af2dc61b9f84d74f7df5fee991b530dba92. 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/TCAIJ2400299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176ae42c9eff5f521addf3320e7ad3dbc808abcfad3f1de7ff5514220fb9fc8d. 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/TCAIJ2400304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d726410ed403c79f805db6b5b10a0f2fb863177134397f8a483b9b3858f497. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAIO2439771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f57cf5d7efed9fdee9e44dbc143a35abdf7a4beb7b2b4250db5ff3acadf720c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TCAIX2496286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44204cf9951c3ada89f11164c3609bbf63c772c8413498844da064c0d26a0af1. 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/TCAJC2447208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb45614be62ee5c55d2569bb4fc7b7d7778f592decf7187669d02cfb6479896. 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/TCAJI2507210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7118d1e92bfc78dae3b55dd2c768ed698c039800423faad79a0151dfa6ab8168. 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/TCAJJ2573299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a3a6678c417f35aa052c89e99067929085b70133a28e70594a11661d8c692c. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/TCAJO2545426.