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 0xb5cb7f0a575d89ffe550add8b713cfa7f2761a6e007bbe3de58fffebf58afa2d. 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/2bc71ef4-f38b-4b27-940e-3520b98268ae.json and https://artists.proofprofile.net/proofs/artist/2bc71ef4-f38b-4b27-940e-3520b98268ae.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 0x967b6a4f66d086c007b3dd12d2b112ada8a1beb97b7ddda4c679db866609616f. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZK6L2481686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672d1e9db71fdad75940d22efc18541bd0141e252be1703aafc39bb425705ae1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6L2435344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b170afdfe780d7d81fe61019bbefab6fd98a53662e867d7da151521d7e4b13d. 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/QZK6H2418635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd4b300f57720a1c2b7b536c00537dbf2c21da92e46e734b3344779ad843c88. 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/QZK6H2418638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec162bd3c42af5405540d1b541a98c26124071a2625819dcae85f52aae3ae29. 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/QZK6H2418641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c09482a118ee4376135ef4771eed00cd3c34aee81b3aa7da71b752623892c8. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZK6H2418642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e759cda006d738817bc7cbf53fbd5fe4f9c9408e6d8494a8828267cc2a1770. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:39:20Z), 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/QZK6H2418644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe28925d3b1e7e5e8f61cbfe4a54f7ee162328f040908f11a0157d5e9660dcc. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZK6H2418645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e588e2fb987d3b11dc70960757669d1dd5ea9b393157c051535ac182d0b59c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6L2467779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ee3bf7467dd4d2262b5a49f9fcf6b83e6abbdb9371849259eaa5cd6971c5be. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6K2402723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3795257a645530d3256d53f44a1aa5d21e56777cec866ea0a874d4e2747bfef9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6K2402731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7525f1717eeba58055b042dedc349a7598af7afe2c0d1bf512a3b99920e3b23e. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZK6H2419487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa895b0763b4cf2920396481f1eae09f53cd8970243479765872e6e8af289f026. 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/QZK6H2421105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e44f9468aec0f3756a1499c2cc0bd8b28b26aa2dbca526abb5a56df80bfc2c2. 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/QZK6H2421106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f475b8de67e4c2721b606450970ca63d5015746e030c25de0a9846230804a25. 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/QZK6H2421108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ec9d2bfec8e7b22dbd049ab3d0fdf7be66b388b23b51a235d529707613c77a. 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/QZK6H2421110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47645a9cc483f493ca12f46b17a8e73813b5eece91371b4d94971d2813c7928b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:02Z), 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/QZK6H2421111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc6211214fec98561d70c887a58546c24fec99fca381eadb84c78a4507f596f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZK6H2421112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873d61dac870561cb3b0cf301545e30eb45b090b92b3d147577df8bfa32c0e9c. 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/QZK6H2421113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981db44046078dea7ec1c912e831af69d603348ba6deffca2e944df10d1a14b0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:59Z), 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/QZK6H2421114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6559b4db0038a9eb0d75bc8a3af8641ceaa68c855320f3b5eae6aa2da00bf5. 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/QZK6H2421115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a534b94356cd9ced2e61f944672e7a5dee7a4a6b6f6cabe3c5394a441ef878. 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/QZK6H2421116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de09bd7c7109f619d603ac167fc24f7827a92c31bfcb0da7e09ae81f69fcbef. 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/QZK6H2421117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50cfa72b88492dd8e0a3cac0688db239631274949bffaaf20132a9b4bc4502f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZK6H2421118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc219a2158d89095ac8005655d6b2ee294c777e6a71e943451ef45d3eec5fc035. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZK6H2421119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6d49a70d3af97e73cb295570313227d92c849a9c6bd240379479903962f1c1. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:00:40Z), 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/QZK6H2421121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d836ece7b32247978a4f087407136cca0ace6430a08fe61051d5ec1bcccaef. 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/QZK6H2421122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b822e4afbf35c430557f12f0f597cf1e2fb4b96680ca205f8c44423f7d6ffd8. 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/QZNWT2492708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e50bb93419d73df33320a2cd416e0fc9fc642d487d4b0ddc055d054e181cae. 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/QZNWU2444529.