Macklemore & Ryan Lewis were an American hip hop duo from Seattle, Washington, formed in 2009 by rapper MacklemoreTrust, Gary (2013) "Macklemore & Ryan Lewis' 'Can't Hold Us' Makes Hot 100 History", B
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 0xc10d982d3386832381c724e6316de2d1fffba42b156482c4e38f81aa4f6e0f74. 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/96382403-863b-425a-a2e6-5f1e347e70b5.json and https://artists.proofprofile.net/proofs/artist/96382403-863b-425a-a2e6-5f1e347e70b5.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 0x368666b576a59c7911171867ca868aa0e319374caac2c0a0c31f9c9018e77fd3. 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/GMM881200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534841a990f788ac4224e1bd3f3c8397d7130050385d6b8fb25ea11777480bb4. 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/GMM881200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c534cae707366638f4901afab5fd331f45aa0e62f05bc2ccc47a6be35c0b20. 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/GMM881200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44413392f366480a370d44d7ef51f4bfe0e98f0a678530af38afb4726e82c86f. 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/GMM881200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a4c519db5f7890c98864605ba968b5e73efd00424b7efe827a8f29bb2e4505. 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/GMM881200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e5768a4f0b9fdbc29de00bc1b6f514292d58a2ef608ffc5704b896e1cd7578. 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/GMM881200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47503a1a3dc88d64226ba1ac9864a9b9e4d5d4b89978f7a4a42b21ef85c92131. 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/GMM881200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ebedec7629afbb5963b13ab050442c80b5e277ad055cb0cb7a03872974e016. 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/GMM881200008.
White Walls (feat. ScHoolboy Q & Hollis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6becee5826f610e29a9e06314548ab6c7c36d2433cafaa7ab7a6bd077ea7dc7f. 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/GMM881200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3ff28f0f93692efc325da75e72d44296546eac734ffc2efd39feefc3a80b1c. 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/GMM881200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fd4db34afab6a59af036a360f24752418a4ab6c3da4c5dedd8996ad8dd0e5a. 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/GMM881200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5818f930be82a96fa1c4bf07de60e4f8a70ce60d2e5b6a935e2ffc0579a687c3. 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/GMM881200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f162ace8baed6ed382b14111de0d5cc435eccde02d6672950de4b5012054fca. 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/GMM881200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4945712a2d14e1fcc36af73ab2aadfac2ec2d3391842db6a555af5ad0a624eb2. 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/GMM881200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512ce3ec3db5dd50fd431014b603877ba9777a45ed866ead6197e24adde37b95. 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/GMM881200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2955d38498fe3267a39ca602f9fa7715472d8195fecca71c6353f92a8431459b. 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/GMM881600001.
Downtown (feat. Melle Mel, Grandmaster Caz, Kool Moe Dee & Eric Nally)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b6d8f1fcc318c22e96c07adb82aa3bc4f88e11b4f2cd2325e81595f5b3f30c. 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/GMM881500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0ea1699a50a8b0be7e9719f70c575522470c9cc178462e81502bf4ea380938. 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/GMM881600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bc261fdf5306d5c3437db80005a42d72c934fc5f27c748716aa895e3805778. 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/GMM881600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a8604873ce283e148da70696f45ef1f2eb4395bcc4a2007097f0945c6b6743. 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/GMM881600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce08d06c169646c9ff4aa70e0acfe37cf228d299a98325ec194bcaab14e49791. 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/GMM881600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ccb7c7d496b929849c8a2224405c45767d3137f22f47fb69de7cfdcf1f877a. 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/GMM881600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6c0d514f3404b227ac787e62864f6940e52bda48a463e5c2e0adf2c7548ab0. 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/GMM881600007.
Dance Off (feat. Idris Elba & Anderson .Paak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48e388ccbe9ba9d6450cef070ad04bbb94ebb01712ee5e89e06075f96c02275. 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/GMM881600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3968efcca0b4763c2a8e3d193fb5426587469e87809360eeffcefdcbd692dae9. 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/GMM881600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faff4c01a5543a222d87fcdcdc7e181cb19758903fc8c8a3c3b43022a8346dd. 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/GMM881600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f4f0b3c524a15f1004979a03ee1b938266b10540680656a07e9608ddb830f5. 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/GMM881600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781838a852dcd41c35c062d349452e1141fd50475088b74d220e89c3b506d645. 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/GMM881600012.