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 0xe4317cdb93e42943e8558913044e6848d64a5eac9d138daf5439bbc991465dd6. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59e43a95-d4d1-4aee-b882-3d91c19c5fc3.json and https://artists.proofprofile.net/proofs/artist/59e43a95-d4d1-4aee-b882-3d91c19c5fc3.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 0x1503656bca287e22dbed528751d8bc42fcf341ece87a20b871f85f2b80a61092. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBMA22480331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071afba67e523632221a0486efae4a7bf2bc37823b4026b89c966eeefa9292f2. 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/GBMA22353868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8409465cf91a6f5af09ae92640856f8fdeb5b5e308e4855a404016a84123d4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBMA22353869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cd2a19a0f91f00f93f58fe510a330c5fd3618394b4e342eeab4fb8e6231aae. 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/GBMA22353870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197e502cb94936b50d2bf0feccd4d60fffcd2e7fd1672653024e780bf4af6c85. 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/GBMA22353871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f345e7a12c6a08dbe1e3b36ad6f478522d58c2af4540b5f007ece2654da7b4c. 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/GBMA22353872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed3d8f7db49debd3b62d51e910f27f4be5a34972f822d3b984f3067d10999b2. 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/GX53U2325125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296df04a6309ae31d2dcbfdd48ddb85fe253ea780ae3287bcf310a0784331200. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GX53U2325126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5d022b77af58aca8c54fb03feaaeb726af2337d32593be7b4b1cec72aa72b5. 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/GX53U2325129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196306e4aed904c2813a85dda7144e8af2204abb8468728995031ec085c47ff2. 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/GX53U2326238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1907e723ed25b22154e0e5abd32b3c54abb9b2288a4496c2a11fc1d2f010b750. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GX53U2326239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c8dd88bf3f042b5219253cf5f4e36a734dd5aea8a9e0f870055872d9c5c243. 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/GX53U2326240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ef4410bd306d6c56c85c19caaddab093e5a572f10e63518b9d7f5a80ef19a6. 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/GX53U2326241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7e81eeb5a951ec7cb1ae0c9866ecf6048682e3522eef6b9dc02d1c97232f3e. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GX53U2326242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54b892ec3a61fd91deb1c6634690ea252089a61b1b26472b3b4fac9f8cb5fc9. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GX53U2326243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9372863d8b1827558f5472f0a77e64aea8b1ee56dae60df05f082c415218a0d1. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GX53U2326244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098093290907512089861bd6938335df2b530d4390353e9bb3414c3133770246. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GX53U2326245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93822655e851ae9c4cd58bc11f984a3ef26d9911340b00193cbf30bbb8cdbed. 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/GX53U2326246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dab7ae4e4381f7e35cecaf1fba6e25b4bc54664ff0db40c5eeb917ea9098189. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GX53U2326247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d328c64faaa777b5f5c56bcf4ee2cb9ad5f92a8a2702c0c77806405c4b1613. 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/GX53U2326248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8350169ea9bada2cb331298adca4b06f81fc6bbf1384c4329eb90d195557a051. 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/GX53U2326249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbade533af88e9cc9876a706f9212896313d74f15fe964a72391080999773c1af. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GX53U2328287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fa36a617b8900a5f02379ce244d674b7e0eecc637e4aa7d0b961a01eed4f6f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GX53U2328288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1308f26964ba7839c25c896dcb05d00ea102d22e8f12b4983781a1bcae8e02a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GX53U2328289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bb7b4918da37a47c843e1cc78513d6ed90e4ed7643e05d1f9894d5507a1cd0. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/GX53U2328290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb8070ae6fe8e5b3eaeeadc26bc96a6866977011271561e6a802c32c2d18ea4. 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/GX53U2328291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe324d6769705178e1f19092055f5ec9421140e5e2f98825df887d9a91dcbf72c. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GX53U2328292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdd80aa5d9f481de724bd1f2ee4a61dbec75805ea0350223b429bda4ea21909. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GX53U2328293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98d8fd1e9a51d51feef70e42c3143e9ed26f09f26f2c596f9d2a83027826f7b. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/GX53U2328294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51730c8130d5cbd92e1c72f5e994288baaada2481054b21d6a16b26f8ea02a03. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GX53U2328295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a54347394db3c3c16b476bc28a7300643602fed9060fff42012387249465249. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GX53U2328296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f3d8b94f063efd4add125bad3dd50c3bd651f14e6617fae12ead0d0a1a7dc8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GX53U2328297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1edcd717a65dea7e098849c6bfe2b5c19385894a1a94efd78c0576e219138c. 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/GX53U2328298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f336bb725b1c9284b31c3cbaf4cc24dc7963790e026b5f31cb4125d52fa131. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/GX53U2328299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443048f5112088dc4b37f00af57cf5578248556d13a806ea3316e8d5bbf3db5b. 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/GX53U2328300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cbdc8af1235bb9c9fa439ace14e074ca5d3c6fbf3d35e5287b7b9b82461994. 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/GX53U2328301.