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 0x95995771e004253a520d192232891bde10fb042c6cf77269e48e71c17606b002. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/778d15b2-95f2-469e-a605-0e454ed2a3bd.json and https://artists.proofprofile.net/proofs/artist/778d15b2-95f2-469e-a605-0e454ed2a3bd.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 0x25f533a880f25686b4c5f550da376e29c39db03acdd968a9458e439900f3afbb. 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/DEQN41500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5cbebb935366bfc3e3bdf2fffa1dffadda20da0ab426fe65dfa0b5cd7f0f47. 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/DEQN41500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf605ad65bd8d6e8e40e0f108a1ffd9257d8b4bb6f9bebc59224c03b15798ef0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEQN41500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214458c68d53e81a4b3bd42ba42c7a83f3b2755188e2926af0bae6c11bd64d34. 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/DEQN41500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99485945de21b17e32e5a426eb003c8a64b7d0a023045fd021966b49cb04acd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEQN41500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2d3bb7f7b0a6f59fd3e31a1ae12f576800f793429def746e340a9779469aa8. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEQN41500104.
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 0xb0abf1981226999d7cdc9c7bc6299be62e6d3a36e10853859d8989fb27c2600f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEQN41500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26565d631de89d151533b66ce37a0fe19d12bddfdc71406258263af8f04cc76b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEQN41500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffc7ac1ade26319fcb87cdf895c613302f3a60c54ee6d7ec3e843650de394c8. 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/GBBPB1201800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8269f3b14a9cf0a03025078f36ca3402c865a7686582ea01d363a56db5f5958. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBBPB1201802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571dbb395528a06e633852b664afee5d61880102a81fde8ff57a82198ff62ff9. 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/GBBPB1201804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410b78d7bde350a7121c2cc9c7a081d5e0d6dd251094e09a855c4fec2f9d5a04. 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/GBBPB1201805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8906ec7b2a18864f6c97c74fab2a086817433c36a29586f7fc47133f06f5c4c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBBPB1201797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd641580a6cc094a7e86ead9f534d3b1cad8799b6327bd63c2ca4ac454a801212. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBBPB1201798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccf82f442527b8122478237bc0f2b31d09c4d7f691de3d2d2c2d077b63c3760. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBBPB1201799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38301c82321ca13ec26d9868447f36d2eb4fd17cf9f13956ae7df9be7e5e116e. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/GBBPB1201801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc7a62d472f3743c5af89034e99801ab7341d2210bd5072ca628e2924bd06b5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBBPB1201803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ecef6d091f1c61306fc0febcbefacff7b329c5336186a151435e9e5b6258e1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBBPB1201806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd245f480038fffff696c5f7bf8768d7cff175da19abf3987547936e3dcd21f77. 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/GBBPB1201767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2192dcbbdcc08abb5e9b59cea2b37e536abc45f73f5f219b4a9af82b66f10c. 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/GBBPB1201768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdda167fb6b460ab9f495127eab09a8ab801c05d8f8cb777e4af314d4022405f. 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/GBBPB1201769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733fe1b9a86c39721a423f234a58d91106b7be1018faa698fcadc9c0155d3131. 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/GBBPB1201770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58612764173df0c6e01dfb15839fb7dfe1e5a964ade595bbfebe0af843e9d04a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBBPB1201771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc038e34caf290be0093f556920500d822cbcfed9ce4d5af88661bd8f8b0061. 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/GBBPB1201772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4cbf4181f3ae136c7767e0eeed3b6f9e6f12efc697dd2a2866b6d2ad5df1dd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBBPB1201773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f772eb554e56ccb4cd7c1d2713ea4c6662e196d0d27b87d087361512fc7e418. 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/GBBPB1201774.