Kevin Drew (born September 9, 1976) is a Canadian musician and songwriter who, together with Brendan Canning, founded the expansive Toronto baroque-pop collective Broken Social Scene. He was also part
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 0x87c8a7f4b84d09e7233788bb00e7c90a042696b28bf45e89eddda1523a0685cf. 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/74b7794a-e56e-45ea-abea-8cba8d1bb52d.json and https://artists.proofprofile.net/proofs/artist/74b7794a-e56e-45ea-abea-8cba8d1bb52d.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 0xc5f5954bbc93d744f845ea1ba084950b8cfaa338be2821eafb0f67bdaf1268e8. 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/CAAA12221402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3051d3041d43f6510d2b9aaeb658d7231b4db5a9fd0e8f820c03ba0d3c525281. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:55:31Z), 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/CAAA12221404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdbee16d96b3f96fd8c51799a5b63b66d656cca792cdabc67e2598d7e3bb538. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAAA12221405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb1756d390edec656d5d9fd5bf2ca27091f59a2fb6ac94886280c30b473a32e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAAA12221406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4e879e659ada23edaf7ddb7fbc746ea6584588abc34f8653a0e74857fd61bc. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/CAAA12221407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd318e7e51afb66586811437a124cbda6c929943afd434e97e94dec9fb0bb2fbd. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CAAA12221401.
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 0x3fabfb969ee66e653fc895bac804ab0ba778f45edeb4e4950fc2eaaafb0f4ffa. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CAAA12221403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2782eaa639c9fa88efb212e4f0c1ae8b20fdef1463721db9b13a05ed8c7cd38e. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/CAAA12221408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7489c2a5a073f6e4627eb07b76d28ad1505d7d0e44d24ee56a558782481029a0. 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/CAAA12120201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5773b4aa7239478fc19eab5e8d34507684c9d89ff3b3d0d24554191362e1b3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAAA12120202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3040a44e604a12680cca72d0f797b76be61b1352a057426b7b166e97e5897e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAAA12120203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5b9c707a4c623609564b0d3d399f39ebdc96e5569b5cab42357acd1e809668. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAAA12120206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c438ab373923258c43558ff3cdb4fcdbf66634f2f6dfee6bcf24f3d658ff872. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAAA12120208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26480b01e939c3aa2acc1b092543b9e3b21c72c53b6d7f203a334cad89d5e0a4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CAAA12120204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1340e0455d124859bffb79b4075ee25d9288f2b39f6d770890a35e15c951a895. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/CAAA12120205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b47c48e14a1aac38b778f5ddb65d66eb4b0cc6692ee91838a8bb4b143285850. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CAAA12120207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c4e4f7e9bf720609e11587f5621e8df49381c861afb35d70fa2ecffa3db286. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAAA11308503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097c9b16c870ce8da3900b947d2a5ef9749f7b4c869dde8d5494495928a4747e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:51:19Z), 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/CAAA11308502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46206e5b06a979b0b0e8acfd1a59b276f6348bf1ef43409959fb62e48fe09c1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CAAA11308509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77a9d857d6e7ffc5fd3fa211d86be9161fcb6ad1059264af8e98c34366e23f9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAAA10702702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6948ace98a4e3f893d161f20021df54e7d249834a1af54223f626a625bb55e6f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAAA10702707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7756f63830ee91d699ca57960b3561fc9a34e7d5abeac54d86a158226f2d377d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAAA10702711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebebd3d495897f811d2c3e557f50fffba869e35a0b9a792ca62099c0f3c210c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAAA10702708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b61dd6a96942125d1090610940069e49247154f1779a842339c577afee860bf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAAA10702710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261643b2adbc6ce586147434774aa29e17131b88301f4b648dde60c387146bbb. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/CAAA10702701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5f669b8e752e3aeae5a6cde553e136d1ad373b562238db67bc8677e55ae3b1. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CAAA10702704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa587a25649d5886be7e21cabf89770642f2c288316640345633d195980d2a6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CAAA10702705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1784ed7c158d916482b63a7eef6e05e3b45ee688ac0882e463478a9ad673da18. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CAAA10702703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eea12da3379a94934e15480d213b16d361f5ae1c2cb4acccc5ab53f65ab02c9. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CAAA10702706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc9c846f7da79a709407bef7aac49f81e23dd122990141cce01d379ae05f5a3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CAAA10702714.