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 0x9742f3566a39c991ea9b15d50ec0072bea63ef391e189717e2f60f5b5b98ddf3. 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/5a3618d1-6af1-4aa0-a8ed-3e341f17d413.json and https://artists.proofprofile.net/proofs/artist/5a3618d1-6af1-4aa0-a8ed-3e341f17d413.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 0x7013456dedcae19dc8d8196fcebc0e36bed2b1c78fddc6779aeea6021eff36d7. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CALVP2493404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca73c9b69c01c84620ee3b321aeb7a80011deec77a7c7c9433af830d8bb3a42e. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:54:16Z), 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/CALVP2493405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aace488d15ee5bf9c265bfea3636b1ed1be14245b49a38b6b5da725bb7796a7. 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/CALVP2493407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab5b8213f0c47cd87625ee7d9d31ee12969023441fdce5524d4c736afa7445d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CALVP2493408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71545aba3bd28a1dc6b7f8fdc1690ea8cda1d4e1b186b06f3ff2011f7982ee82. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CALVP2493409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6e8bc1a3a4901725524e951cead736d9f00ed6f7ce0ed3b0d8855bbc026979. 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/CALVP2493444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0db11f2e854e7a0e460cbfdeee2060f6691d02cdec40891e89b2da8e5b51c0. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CALVP2493447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44f6c698c4f4c52a552f57e6d251f95b8e1cf5800a85093163fbe047678dfbe. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:05:44Z), 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/CALVP2493449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100bb909fde3ee47dde24cb8b734008779289bc73772fb5990ac85a51452223c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CALVP2493451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb40d9dd6d8a34abf4b341ddf51808703ce2cd1228feb59377d18821aeeba132. 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/CALVP2493391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f4c4260816d24a41f0c2efbd539e57ca37856a7b18446361bd0471efaab640. 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/CALVP2493390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289164f88f31f6ec19c576a577d5d9ac7822dc9b242255a43cf3566d854051bf. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/CALVP2493386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5ee5ce72e3d6c29d4d99028ab5e805123436f1a00b6efe5b3932c5b9c6b33f. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/CALVP2493415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca23de1d8b6c8d3ae787c341466c7d5e6aaff80f0b6be2c14db8a25f5c12fdb4. 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/CALVP2493416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1644420bca03cc13cb8785b3e3fb4db5073c7a0ddebbc6748c90c7cbfc2f7c2c. 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/CALVP2493418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3e8c358c9e4164b3676e649e46b01d22808d26390f4861d45db8cc17c65b5d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CALVP2493420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb2dee4a605ede582113687daa9966e64a933afb584768e61e8b4805fc4240e. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:01:27Z), 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/CALVP2493461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f20cfab3e9e142c4c06f7dc62c8dd69b9dfaf49f4d7054669bc12b2eb1cf007. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/CALVP2493462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fc5b329f308976a0779d98cdb9a0fe6578b4563aa78e9084a723101032bb49. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/CALVP2493464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae294b37e6a5cc02c6e0900d3834b9950b3c83e2590008580824c8db52d34b7. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/CALVP2493467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f94354d490515a8f015d4aa8bb8a34b0a3223a25e8c348c9c20ec49cad7901. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:46:21Z), 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/CALVP2493432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3513440b78e4f268c1a599cdd73fac1a60bc918af891a0c2485e341c5aea7c9. 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/CALVP2493437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e4bb18901e3f227e2f2e4394e3b49c3aad2d34d727a033adf16a9d786be385. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:46:11Z), 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/CALVP2493439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca163873cf58e505f9e4442970bbcf90f389892d86f85dc99c02bba825a926b2. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/CAQOI2414854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf15b15809534cf0330fad23b21c3ec429c642be2c11e62fe767d2fbf0894e2. 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/CAQOI2414858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b15d32482883d5c25ecbd4e77fa70c50bb5345fc9dcdc499164fb12df3cad1. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GBLV62401704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda616eec5e1d4109e3b6da07659aba8f5dfa14d9ad185e79b6bbc93214fd0b37. 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/GBLV62401705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5673aafc1904fb9e391d8198cdc2a7752da5364b851f74502fe24a7fa789a5. 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/GBLV62401694.