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 0x38c11a49523c9175354e4fa4869a22529eb7a0d6f26e70a4b91e40a5c663ab45. 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/4c2cfd2e-03e4-4c05-977f-a53491a9db75.json and https://artists.proofprofile.net/proofs/artist/4c2cfd2e-03e4-4c05-977f-a53491a9db75.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kachakero, Por Las Calles de Buenos Aires
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 0x9e84bc60c796d9c8ece4e8c779274dad2093ad726a77e4f5e5c9145f63cb4da0. 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/SE6A92181680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78493887b461cab01b31fbe856e31d55977befcff8fa3ff3e8c593885b0fcd1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SE6A92181681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52843aa4f78525004679bb1247907494c65d0af9b65395bce86ad8c6678bd138. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/SE6A92179040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dfbaf25c1947f23fdf5b07b86ee1e36258420ed6964383f28295448335e481. 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/SE6A92179042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ee4cb3fa7806faa4a36a6bcaae184f791ae26a6b41e38a454d58ae4b90d916. 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/SE6A92179051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f0225d198e631498ac531b26065056d10d72cfc8997b97386070246b08a43f. 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/SE6SA2142747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a38c0986556cb30a071098867fdaba0e546e723d15be103c094eab59ba9599. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:31:16Z), 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/SE6A92179198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52843aa4f78525004679bb1247907494c65d0af9b65395bce86ad8c6678bd138. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:48:10Z), 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/SE6A92179040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99cf31e74567ee688f72234a1eb11d7a167a790a92556b7099dbde2c5aa1c19. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/SE6A92179041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dfbaf25c1947f23fdf5b07b86ee1e36258420ed6964383f28295448335e481. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE6A92179042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f89b706c0d381acc2b05f533318b99d37b5f1b494d64cca4efa9a2b07f7ebc5. 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/SE6A92179043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ee4cb3fa7806faa4a36a6bcaae184f791ae26a6b41e38a454d58ae4b90d916. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE6A92179051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f12834faa46562c7f6edadfd91ecfb75b6575eb345f9915f95e2db9984e18e3. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:33:18Z), 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/SE6A92179054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11426c70a6b414509c546e0e37eaa3888f6a7a5764ae97dd109131abcbddc501. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE6A92181669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5beb4ef5b18b9d4b300dce50065f5197efa7d88d953582a7a24c1320c4ec9bd. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:24:17Z), 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/SE6A92181670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e84bc60c796d9c8ece4e8c779274dad2093ad726a77e4f5e5c9145f63cb4da0. 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/SE6A92181680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78493887b461cab01b31fbe856e31d55977befcff8fa3ff3e8c593885b0fcd1. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:42:35Z), 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/SE6A92181681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5035b4cdf624a647dc67df21b009c67bcd1856fac5825f6f4ee0576e8b0b3c9. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/SE6A92182475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e7604b4efaf1ac831bc7ace9d5a23d2de115e0eb1a0f3fc582323dab1943b2. 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/SE6A92182487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d4be2317877cfb794305f6f9970f5ac42629a726ccc970a648eaa17093279d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/SE6A92182490.