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 0xee386e0f49b36890d38bd1c0c371310d7627d20f72abf8b857645d934d0ea8bf. 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/c9fd979b-47ef-41b9-9adc-81c4d60b91c8.json and https://artists.proofprofile.net/proofs/artist/c9fd979b-47ef-41b9-9adc-81c4d60b91c8.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 0x4b7b3c28f575b2bd7b7d47bbbf1ad4c76701af52bf84bc4af1ac867bc430b2c5. 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/DEN061800656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e5ccb83b3ab2d6b1c7deb513b45e2755e15b1a9e21bd9abcd3f4fd1aca2abf. 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/DEN061902299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505a60484c19c68fd4467927dfbd80efc49231d739994924d0d33038b1d6de9a. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DEA812000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64bf23e38d544011e7d94905c97a91be0ab2bdbd0d2030d940f7d83559995f9. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/DEA812000516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57979ec132db4901356b638986c97ad81b0938a16820cee0504004d0a7c3056. 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/DEA812000562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6f2378225425fb0bc94af9202783aafd8853aafe104531404ed79f30c1f479. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEA812100144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3071d359e948ed95335e823e67bb4c0058e3d19a442becf979778f8fcbda375. 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/DEA812100264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f39d1c0870728ce1819952515e5b27e4098a4eecbfa3fdd494bacf836e2598. 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/DEA812200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e38b8b40940f84be649fa1a01ebf2e6ebd7af97c5582de178d595ce5565308. 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/GBPQS2100292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d0e192bc8ca6ced0da90370ba26085f3727ebae61b4e8dd87e57bd61e8143e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DEA812200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03aa821add416b6fbbe93fc70e7ac2cff061c3cd395f2c818fad84fbbd3c79b1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US39N2300481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6e4f566405a6a845d56a4b5f01456a30d913fb8849682348e414471241fd67. 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/GBK6Y2251761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba871180d52e6949c27eb43af9abfe0124cf19f00d02271bf6dabf13a32ae54. 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/US39N2308796.
Makes Me Feel (feat. Lilly Ahlberg) [Extended Mix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdce154ddd70996f8974d3ea433a49f17d720cadc0aad59f8c748824f1c0086. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/GBHAD2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf465384e5ed09b22f87ce6c88d77344c41613df1f1a53f1bf28cdec44c7d72a6. 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/AUDCB1702472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f459a6ef8e24a9b0b5d8ecf7d87aff892592fe5315424c8b023a88057bff732. 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/US38Y2409458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15deaa43edb25e19e3fbe0db71f63ebc0bb706dd7e0a692dda53f2159beff882. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/AUDCB1702850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7543f3684a34be4c25f04f35921fa2bf79609c777b83ec87d099954405f45713. 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/QM6N22532618.
Kontor Sports - Nonstop Powermix, 2020.03
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacf27da4316334765a3e3de0c199078534e5a25dc1e98a718c98ccc6af74906. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEN062003104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc340606baa32b74e11b4e2dfd29be7f506eb39b2dcb79433831c42d3b36f187e. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DEUE41500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba028aff83bc443342b34b2132bc3d1e40fd62814772ace9dde445b28beed427. 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/DEA622200253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4305f90f1e3192d8bd6f4ef4ce70d2fa0736c3e446d50bf4ef718fde3f7401. 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/DEA622200255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ea0c845a6df4db3c72be5fdb6573425ac1ae4d6da115050b0e73ca8d28f368. 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/QZGLM2461713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508026f113f81f0a7ae7f91c4627f086d3e001b4a428d69d39893eb40c218ca5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEUM72207003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4194bb49be8eb02060d891dd8f1057631bcb8d148f82634401532b06d10cef1. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DEN061900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81955d6783ef2bdf8a531ad2fe6817905b7647fe2448f951be423dcadca0f0a1. 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/DEN061900023.