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 0x457a90e4d86d15bd80b04d79717616b31f670ed5bef67647c91e6cedf3a8d2a9. 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/dc3b82fa-ab73-4f12-812c-e9adfde8276a.json and https://artists.proofprofile.net/proofs/artist/dc3b82fa-ab73-4f12-812c-e9adfde8276a.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 0x0cab7c81db07b63ca080bae6ca652dc824cda2e3ce51e1a83d74f15fed92eac0. 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/GBF077220030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034d92c00fee8f23d1afe2883df05905b0721b7a1f12e1feb4df4889069bd985. 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/USCA27700197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52db0c214bee7b0dc8627cd4f5f5e444f4b9d9dc120642635f3874e2cc2b2ebd. 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/USMO16900526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7a3eb92ebe226f85a173b4b6d629da5490d9d2101d6b27787ef1da5bd8d3ed. 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/USPR39402007.
Cotton Fields (The Cotton Song) - Remastered 2001
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca64914d2c4c585a36cca0c2ebe86970127a65821295eaa34fdd095ae557cff2. 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/USCA20100323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07ab010889c5b4441d2703d6315d3fe893f4d59aa1c1cae6bf364f5b3b40ae6. 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/GBF087300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54524c3e5c245d7ecffd2e0848cafcc705a239c61b5f82b8c3a76e6ea3b45c13. 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/USMC17149944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1770be478eae34db935f28e2b78f58099bbca3f87a355e8a6a7a5bee3ec6820a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLA270600400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013f2876d9febb799c6bd282a378eca03a56bdbc39893388455917ce2ba79524. 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/GBAAA7900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c5e0ef0c6a6331d13cddda197856c300b20b804b87205cd75b1fb5b737a979. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USAM17200352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dada645fb6a6391cdf97cdf548fb00a052b2f223be2a337deaa3f581dc5b1ce. 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/NLA307100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd728055c48472816c8af71ec4e644e692fe9785d06498de878490cf908d14a. 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/GBF087000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9604020b2b89521bac5ed7c7e13941a4222021f358e8042c04f0ce2c18d4c77d. 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/NLA270300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5440a3273ef05bbb195265b319a515132c94c0ef0772bfaf51df0129e7bcc6b. 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/USFI87100476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f791916ecf55a22dc08a4ec76d4ea1b2dd823f06ea5d324e47116f4fac4ea0d. 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/BEUM70900418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09569829ea7bd60b0f81e08e42b4b7e3c7f39205fd13445f0945c944a07f8319. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USIR20200522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bd6a3decc26e14d175abd6d4684a8604ea794a510fff55e60b1dbb746dcd4f. 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/USMC19857476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260fec1dbf8b4310dc220ceaf57fad4709c0f0e8abbcfe9143ebf3a0c0364f03. 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/GBAJE7000326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4094134730b07bb77005237509293d2e65287b4d9b0b617c751e46b25fcde442. 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/GBAJE7600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c94b457b8cdb83d9ffeae5e3dfcd8db6dafaa7f7390a29decefea938603970. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBAJE7000719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490ec4c42582722c195240b10e7a298247ca80f9639261f7a7bacabb8ca645c6. 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/GBAJE0610844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd640948e31a4686b20924bc2b5c43b54713520931fcf29384de4ee67e3cce3e7. 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/GBF087500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f24ca296828ed1eb0c868931bb8bb3a794a2d7b6e45061be789b15193d6b30. 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/GBAJE7900088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceed523ac93a6955f98346ae1b1004a6cde14940c7a93848a729db7a8ad45fc6. 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/GBUM71021600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5421f7595d9baafab1c4521577e3f898b29e1bc9595179b979e0155fc04273d6. 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/GBAAN7700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6d96a5447133cf22eb4572ed8828da2ccd702db3d3d93da7c911ab0a268dbd. 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/GBUM70706561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0810942c1c6d867da161b42db862a42370a40b1af63b5f62bfb9b0a1d42f346. 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/GBAFQ0700270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991a31a498433b184221bef7580dad4ef42ca538647589706e737a00e3ee9b43. 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/GBAFQ0700271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ad9af1104124c12ddf807b6bf715968c24586d7187981e58c3c4ba724656ac. 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/GBAFQ0700282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6b4dd448e6a9ebf09795aa5940455ecfb19f8cc371f452c85a5993995d084d. 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/GBBXS2000001.
When a Man Loves a Woman and More Love Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08ed19365ed3b1133cba3556d20cdea5dcdee2f1a8ec7365308d3e80795cf73. 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/AUXN22031455.